Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da358dfc59358b1…

MALICIOUS

PDF

51.2 KB Created: 2020-10-26 22:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 75058be7f86474b9955db0e17267b69e SHA-1: 33cf930102f05efd29ca704340e3107f535b5e2d SHA-256: 5da358dfc59358b130819c4bba930637d747a386ac7f12d9c265640b10ca125d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://gettraff.ru/strik?keyword=maytag+quiet+series+200+dishwasher+installation+manual'. This redirector is likely used to funnel victims to malicious sites or download further payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=maytag+quiet+series+200+dishwasher+installation+manual In PDF document text
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/15377cd.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/xifeves.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/720f7d6fe5f9.pdfIn PDF document text
    • https://keminugugenoxag.weebly.com/uploads/1/3/4/3/134321568/wogol.pdfIn PDF document text
    • https://munerotilaxamo.weebly.com/uploads/1/3/4/4/134476206/8f08a.pdfIn PDF document text
    • https://jawanowek.weebly.com/uploads/1/3/4/3/134356941/affb10f89.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/wijojo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/64622924162.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/mapaluxedap.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/jumikila.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/78530064637.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/2213278482.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/surat_al_waqiah_arab.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/coreldraw_x7_tutorial_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/janigusebidasodogodukodox.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/radiation_heat_transfer_example_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcdf822-cd1e-4306-9a97-ae0296779ffd/mugavazaxewodob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7c97c5-07f8-4deb-8d22-2eb7602f1498/ciri_nude_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc9feb3-afc0-4206-84a3-c78f23e99f78/tamajotamagixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643d2cb3-a889-49cf-9e61-a6f62c999226/toponozofopimodeviriwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf9681f-acb2-4206-be3b-4246df2c111f/791671685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba82cf96-fe53-46ca-8ad3-700671256224/sagebopajesulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fc96ba7-e8fb-475a-8661-4f58475321b7/90550813926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aece0585-d019-4af8-826c-55e71f13cf2c/dumiponeladutugi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000832b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 5836 bytes
SHA-256: 91da370bcbe833432f8d6ca8f53e13bd9763250c5f522392e19b20d424bb9871
font_01_sfnt_off000096ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EE 12724 bytes
SHA-256: 0742cfa0c638190b6412e09f4a8a18559a6bbfc7f34aab2929b147f931ae5f92