Malicious PDF — malware analysis report

Static analysis result for SHA-256 140e181263ddf322…

MALICIOUS

PDF

45.6 KB Created: 2020-08-07 12:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e06145701b923f85d941f701316f6e1 SHA-1: 39624fe8617bc9ae83577b3e7e42e13bc60714c8 SHA-256: 140e181263ddf32277674fdb2a97ac3fa93b2f2832a223d217d2758e6f64b0e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to domains associated with link farms or SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at ttraff.com, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains text related to English nouns and the PDF's creation tool, suggesting a lure to disguise the malicious links.

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://ttraff.com/pify?keyword=tipos+de+sustantivos+en+ingles+pdf
    • http://files.agateinspections.com/uploads/1/3/2/6/132682899/6fb4097.pdf
    • http://bevovubep.3sooglobal.com/uploads/1/3/1/3/131379732/xalenerodunevij-toraxofufej-zunesabo-wataxu.pdf
    • http://files.holidayplanners.co.in/uploads/1/3/1/1/131163872/4749138.pdf
    • http://files.smarten.org.uk/uploads/1/3/1/3/131380849/76d92b9e797.pdf
    • http://files.gwionraven.com/uploads/1/3/0/7/130739776/4916943.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/minub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/88910314457.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/romobozewalegax.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/sijodomeburo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9660/3814/files/jifop.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/pudog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/nitilabisugosamewibukeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/bezolon.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/xajatudasu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/86664786978.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/xevurerajivokilirited.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/viredog.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/wafejovo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/bot_emoji_discord_copy_and_paste.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007287.bin
53c602bd5f28e3c1253ba8d950c575c379d2f1dfccbf5b3956d792653d127b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7287 5124 bytes
font_01_sfnt_off00008419.bin
cc9a02f54be32a06c7ba042cb972a41acd0e384280a42b8e57509af18a9d5cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8419 11400 bytes

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