Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e57295cc3010a86…

MALICIOUS

PDF

38.5 KB Created: 2020-08-19 01:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dff59cff58ea68e600f89d71b38cc77c SHA-1: d5bf4ad0b93f89d03adea2035f1715e651a99433 SHA-256: 9e57295cc3010a869e3d476d8bea91dd6bcb43e5f28e5746cd914f4bd21d5a76
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and references a 'guide', suggesting a social engineering lure. The presence of numerous links to Shopify domains, some of which are flagged as benign and others unknown, indicates a link farm strategy, likely to improve SEO for malicious content or to host secondary payloads.

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.cc/pify?keyword=internal+control+over+financial+reporting+guide
    • http://files.danklemencic.com/uploads/1/3/0/7/130776602/tasekoval_gulubonuve_kekovabu_fujufem.pdf
    • http://files.zambiasafarihunting.com/uploads/1/3/0/8/130874394/xodosafaniku-jovetujam-vuref.pdf
    • http://gagezugo.4lifecapital.com/uploads/1/3/0/7/130775506/4048508.pdf
    • http://files.misspankhurstslearningspace.com/uploads/1/3/0/9/130969312/danuwiparugevul_kesalezokulos_zusesiripisisa_vajotanalaj.pdf
    • http://files.bexplorers.co.uk/uploads/1/3/2/6/132683005/rezef.pdf
    • https://cdn.shopify.com/s/files/1/0429/2748/9183/files/jasajotunasuxuridusifuba.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/julanu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/45521208024.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/10582508106.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/30798206314.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/ackermann_steering_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0434/8506/9478/files/vlookup_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7175/7718/files/pojezuka.pdf
    • https://cdn.shopify.com/s/files/1/0438/5977/1557/files/sri_rudram_meaning_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058ae.bin
f7a85aa549236cda5b50013bc58c8ca6e7af047488c894347dac87633597cbac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AE 5140 bytes
font_01_sfnt_off00006a39.bin
731c0a9e69b19cdf3b9874056b92607329670f7c633c73c52c43b65188c16f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A39 10164 bytes

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