Malicious PDF — malware analysis report

Static analysis result for SHA-256 6548f909589d8c5e…

MALICIOUS

PDF

51.9 KB Created: 2020-08-02 22:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90e8adb9f17704a56fb327b1e39cd0ea SHA-1: 48cd2f4e975bf5ab1e72311ae3b63102089d116f SHA-256: 6548f909589d8c5e771da90dac850bc0aa2c508781e0d877b6fab3a048d15530
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the same lure text and URL found in the heuristics. The presence of numerous PDF links indicates an attempt to distribute further malicious content or lead users to a link farm.

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=rarest+avon+bottles
    • http://files.eastcountyrfc.org/uploads/1/3/1/8/131871907/2581899.pdf
    • http://files.kdhodges.com/uploads/1/3/2/7/132740321/5360778.pdf
    • http://gixosawij.theoldflockshome.com/uploads/1/3/1/4/131482976/3accabcf29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/26591628512.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/wawunewotufade.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2967/files/79475743500.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/42589768579.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/30816089457.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/zevigelujokaguligugumowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5153/files/8047140408.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/jepitoxuxobagada.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/manaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/zopetunukejurazuriliju.pdf
    • https://cdn.shopify.com/s/files/1/0438/8398/7096/files/60967899309.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/21758196173.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a61.bin
c2915cbf49f56bbeb27800b061f4ec9f1ff9a6f031bc15557e903bdbe7b56e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A61 4624 bytes
font_01_sfnt_off00008a29.bin
ab17ade6f7ea36d14b6a8d79795889185e73c55d238ea1997fbefc78317ecfed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A29 13204 bytes
font_02_sfnt_off0000b41c.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB41C 4324 bytes

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