Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5acd73db164046…

MALICIOUS

PDF

47.3 KB Created: 2020-07-25 01:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 4b53792768b7b360bd17974de87324f1 SHA-1: 9d85eb0443d0b677dbc45d13a4ee599e2b549094 SHA-256: ab5acd73db164046ed2141c164750bad9d68c7c670ae566bc202646ef93d0952
194 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to document conversion, suggesting a lure. The presence of numerous embedded links, many hosted on Shopify, further supports the link farm heuristic, indicating an attempt to manipulate search engine results or distribute malicious links.

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.com/wb?keyword=converter%20doc%20to%20pdf%20program In PDF document text
    • http://files.tourmastersgroup.com/uploads/1/3/2/6/132681783/01b46a.pdfIn PDF document text
    • http://files.newvisionyouth.org/uploads/1/3/2/6/132695288/losusemudejup.pdfIn PDF document text
    • http://files.renewyourminddaily.com/uploads/1/3/1/4/131453674/7700a8b95.pdfIn PDF document text
    • http://files.smilecommunicationsgroup.com/uploads/1/3/2/6/132681002/vebevemiru.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/1/0427/9340/2534/files/74488893652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/xavepewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/xirivurikuvax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/45599153855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7827/0619/files/14451658129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8219/5879/files/tevewokeke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/zadonigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/bemebeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4987/6630/files/mamafozasaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0704/1959/files/sodekewabenep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/wovefoluvubikonizidoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3517/8661/files/goranimadabavilerunifibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/pijideb.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_off000075ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 5088 bytes
SHA-256: 302d1a4d1a4b1e245a121b125ac8ca247a348bdd493bef51c1cda65bf50aea22
font_01_sfnt_off0000872e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x872E 12700 bytes
SHA-256: 1c6701cbb624abf76c4ca27a64eb1acea3e12769373545f5808f6170b2219b3b

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