Malicious PDF — malware analysis report

Static analysis result for SHA-256 7057e6a5597ad28c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 02:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7066bd6a9db1c354b741b7d0bedaeb SHA-1: 6aa30573e4e88b8a6c6f384c27b07b42d8dcafcf SHA-256: 7057e6a5597ad28cbce7a7be48cd3e31763ddc6e6c28ad5c33cdeeb732c707d5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or malware distribution attempt. The document body, though malformed, contains text related to a PDF research paper, likely a lure. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent. The embedded links likely serve to redirect users to malicious sites or download further 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=conductive+atomic+force+microscopy+applications+in+nanomaterials+pdf
    • http://dozubis.zaydesmarket.com/uploads/1/3/1/3/131384635/nenufi-dikogiloku-tebomakidu-tawafexolepe.pdf
    • http://files.luanxueyan.com/uploads/1/3/2/7/132712011/4427979.pdf
    • http://mifan.katielowephotography.com/uploads/1/3/0/9/130969060/xuwexigajudaze.pdf
    • http://files.bethelagchurch.net/uploads/1/3/0/9/130969065/b1f17453b83367.pdf
    • http://files.thesilkfamilyproject.com/uploads/1/3/1/4/131437740/livig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6749/7884/files/jerakoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/misal_diario_catolico_apostolico_romano_1962.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/25584435392.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/76949336290.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/90905434351.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/wirasidijufefalojipexexuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/6413321228.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/gedawegafujokomezipideg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0519/6957/files/42739124218.pdf
    • https://cdn.shopify.com/s/files/1/0439/1701/7256/files/40658771628.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3176/files/38154572345.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_off0000683a.bin
477f342e41e83a50d2bbe28de877a8f7075c794aaf275871d0f9f5f7ec948150		 pdf-font-stream PDF embedded font (sfnt) at offset 0x683A 5368 bytes
font_01_sfnt_off00007a74.bin
a7ee2b366b873b3424a6459b172704aac34062d5780d24d0965ee06647f14aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 9912 bytes

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