Malicious PDF — malware analysis report

Static analysis result for SHA-256 c41ed5ca0d2ed3a8…

MALICIOUS

PDF

49.5 KB Created: 2020-07-22 21:35:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: cea10e57ae237e6440b52a2e9e2f2da3 SHA-1: 85870a41b1201ee66c91d7281ce5eac5b183b1d1 SHA-256: c41ed5ca0d2ed3a8d751c7610c61c6de03a4c352ad087b36db6e63d003f26c16
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains heuristics indicating it links to malicious redirector infrastructure and is part of an SEO link farm, likely a phishing or scam lure. The embedded URL points to a redirector that uses a keyword related to car maintenance, suggesting a pretext for the user to click the link. The ML classifier strongly flagged this PDF as malicious.

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://ttraff.cc/wb?keyword=toyota%20dashboard%20warning%20lights%20pdf In PDF document text
    • http://files.rioxpvista.com/uploads/1/3/1/6/131637034/36c763c9765.pdfIn PDF document text
    • http://files.iwilk.com/uploads/1/3/0/8/130814735/xisepuvafimakoze.pdfIn PDF document text
    • http://files.senaonmyrtle.com/uploads/1/3/0/8/130874141/40b46fd947c.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/1/0427/4490/5884/files/xifutonutetomaparev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1892/7776/files/75912908335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/62900586212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/pamugesinugepomefumideles.pdfIn PDF document text
    • https://mosutag880995420.files.wordpress.com/2020/07/lipenesegasebopibo.pdfIn PDF document text
    • https://relofeziton.files.wordpress.com/2020/07/33021737632.pdfIn PDF document text
    • https://sudulinu.files.wordpress.com/2020/07/59505014935.pdfIn PDF document text
    • https://zolibuvove523289473.files.wordpress.com/2020/06/netubodojowupod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/9735298409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0247/0305/files/19834638088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/81034778123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/40271892141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/51625897224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/39509309534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/tobetefel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000847f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 5256 bytes
SHA-256: d0bda65ba1a239bcd4819e417ea906b4657ff81a9cdb8c9ee7c00f4afed3ca55
font_01_sfnt_off00009661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9661 10008 bytes
SHA-256: 6cbe0bb57e4677ba7c81e0a43fd9939ec214d25e553cf26554388e7440c9bc93

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