Malicious PDF — malware analysis report

Static analysis result for SHA-256 163de1255e7b4465…

MALICIOUS

PDF

45.5 KB Created: 2020-10-25 23:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2b88ed629332c6d71362c99302ffb68a SHA-1: 1275688818c039e359aaa7f0bb274939a352d248 SHA-256: 163de1255e7b44654ee23b948c0bd14ef018d5d0a72cc79d2f8df703bc704dd4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/aws?keyword=affect+vs+effect+pdf In PDF document text
    • https://zifusotoxiwi.weebly.com/uploads/1/3/4/4/134476210/7517108d21f5d4e.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/sozaviderulajunotavu.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/pifuniriwifukob-muxugar-juvokawerer-xalaluxat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/abcd_2_mp3_song_wapking.cc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3602/3205/files/57607783420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/lodobuteniwefineku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6976/7321/files/nikozapikerim.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/fernando_pessoa_poems_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/2018_calendar_with_holidays_india.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/vivosevuwivurimek.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/jaririzivafupufise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/activity_diagram_for_online_shopping_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5265/files/amylose_is_a_reducing_sugar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7258/4380/files/89310502896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/zone_electric_golf_cart_owners_manual.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_off0000751b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x751B 4860 bytes
SHA-256: f83a44eb0b38c308cd5c22a238893c48e77a50dee81e49b965932f8f3d03b5c4
font_01_sfnt_off000085ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CA 10292 bytes
SHA-256: a482f92cc963193968331c962b38c9b374b114ed29203d69c2aa7ef90d74f737

Open this report in the interactive analyzer, or submit your own file for analysis.