Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcb6188b1767c6b…

MALICIOUS

PDF

41.5 KB Created: 2020-08-05 04:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52408f31089185472c8304eefe6dc70 SHA-1: d54d2c6ce950b99097d60fe8b3e61e12bfdbadb4 SHA-256: 5bcb6188b1767c6bd9c8a380f1d16696bda52bae6da168fe8bb17c9a85f6b68f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms this.

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=protocolo+arp+y+rarp+pdf
    • http://files.danielsonchiropractic.com/uploads/1/3/1/3/131379321/xolurona.pdf
    • http://lavevuji.pos-thinking.com/uploads/1/3/1/3/131379578/61458c11f.pdf
    • http://files.makeandmendsomerville.com/uploads/1/3/0/7/130739837/4f43d5faf.pdf
    • http://files.adishsingh.com/uploads/1/3/1/3/131380471/xudexexono_nubemijadef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/15874164060.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6413/files/veguga.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/80185389266.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/vawanifuvetutapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9093/5969/files/42986016519.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/rupabi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9254/1589/files/25897233786.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/debemunoxepodajebi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/69014735696.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/suxatiremajamofedafapadax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/vebulaguwofovesaser.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/tituganomufutalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/4482785027.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_off000063f3.bin
2a846ebc17df33f94cd5841ea16fa02f49f0c78d3017ac8f1a70a5e9306b7000		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5076 bytes
font_01_sfnt_off00007551.bin
a2c2ecdd3e328b787b571751a0074970216a817d691d28b23a0d9a9d2df892b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7551 10560 bytes

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