Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb8816ebca17096…

MALICIOUS

PDF

72.9 KB Created: 2020-08-14 21:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d760c805a3e216c8d6548a1e34fcea06 SHA-1: b2cbcffd00848cddf887e3049a640e200cf56465 SHA-256: 7eb8816ebca170961c8d83b61e95674c3ffc2376410a4ad23bf0811a2b041e62
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, appears to be a lure related to 'content marketing tools'. The presence of multiple external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly indicated maliciousness.

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=content+marketing+tools+guide
    • http://zisesego.ffoy.org/uploads/1/3/1/1/131164250/fekerafo.pdf
    • http://tokizutef.dcigym.com/uploads/1/3/1/0/131070476/241dd.pdf
    • http://files.loxhomeinspections.com/uploads/1/3/1/3/131398455/8e66d958.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/dupidabaxerizonofirodoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/24557938483.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/sixomamamebux.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/betagamabamifozedusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/feguwowujawige.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/fjalori_anglisht_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xorufolikuvuzinekotawoxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5815/files/renotezogupev.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/8319963753.pdf
    • https://cdn.shopify.com/s/files/1/0439/4162/6011/files/sosusufamij.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/22936223156.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/double_bollinger_band_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0431/3274/7927/files/46273385461.pdf
    • https://cdn.shopify.com/s/files/1/0448/6037/5201/files/automatic_control_systems_10th_edition_solution.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f2.bin
e1f5c0cf7572a0d2dc8a05b95e70efb93ae4068189efbd2e715d61632594b64c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F2 5112 bytes
font_01_sfnt_off0000e534.bin
224425131f092230af9f6e477074ea9778fa162b0a26d9f246021ac4a53cc9d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 10188 bytes
font_02_sfnt_off00010802.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10802 4324 bytes

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