Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e89177d281ed8c…

MALICIOUS

PDF

48.8 KB Created: 2020-08-03 19:39:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc3aa7b972e35ffc12ce964725ad6b87 SHA-1: 68371651b7b1011ef3ee3b8c7c10c7ffa48a9d48 SHA-256: 45e89177d281ed8c0716de6ea0763e2898428c7a8c4c1bc64d1458f023064ca4
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm or SEO manipulation, embedding numerous links to external PDF files. One of these links, https://ttraff.cc/pify?keyword=albertine+sarrazin+l+astragale+pdf, is known to redirect to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF. The document body contains garbled text and a reference to the malicious URL, further indicating its intent.

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=albertine+sarrazin+l+astragale+pdf
    • http://files.stocktontrapandskeet.com/uploads/1/3/0/7/130776680/suzokabizatirawa.pdf
    • http://files.boundfortravel.com/uploads/1/3/1/3/131398366/3234494.pdf
    • http://files.reedyboosterclub.com/uploads/1/3/2/8/132814030/tovutara-jiduxujoxiwusip-menenupezozav-zojajiwosol.pdf
    • http://files.mybleusolyoga.com/uploads/1/3/2/6/132683357/b9efe656158ef4e.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/7740553666.pdf
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/ragafunulifikuno.pdf
    • https://cdn.shopify.com/s/files/1/0428/5857/8086/files/54995914776.pdf
    • https://cdn.shopify.com/s/files/1/0433/4511/7342/files/84244705716.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/20378978480.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/45615116075.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/34367440770.pdf
    • https://cdn.shopify.com/s/files/1/0432/8774/0576/files/59405622583.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/cent_sign_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0439/3477/7499/files/10253673401.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/dd_362.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/woworegaloligopem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/takewadumoxobope.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_off00007fea.bin
f62ebf4558602f0b1f25e7c110c4a1dd2c2317eae008d1a0218d90021b48eed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEA 5388 bytes
font_01_sfnt_off00009252.bin
a2f6b8638bc59b01ec3908b76269b41e893153d5413fcf0bb7b9c44de3964f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9252 10612 bytes

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