Malicious PDF — malware analysis report

Static analysis result for SHA-256 0319036a9d0e52da…

MALICIOUS

PDF

48.4 KB Created: 2020-08-05 07:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eccc0c90d3bcaf35c80808eea1dad9c4 SHA-1: 80d8b102e900bfeffe7d6157f1aeebd8ee0d2285 SHA-256: 0319036a9d0e52da1cbe9a89d832590fd01ea1ce8d4bb76241ce585976fe954c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent link, "https://ttraff.cc/pify?keyword=greenhouse+effect+wikipedia+pdf", is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the link farm structure indicate an attempt to drive traffic to potentially harmful sites.

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=greenhouse+effect+wikipedia+pdf
    • http://files.2riverspainters.com/uploads/1/3/0/8/130873804/ce5c87e.pdf
    • http://files.atayloredapproach.com/uploads/1/3/1/4/131438111/4256878.pdf
    • http://files.midnightsand.com.au/uploads/1/3/1/3/131398542/mafenunim.pdf
    • http://files.fayettedentalaesthetics.com/uploads/1/3/0/7/130775980/pufefamewo-femipifadejo-leseforekino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/mexesede.pdf
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/53348711582.pdf
    • https://cdn.shopify.com/s/files/1/0429/2267/2284/files/wuguxelanufeli.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/research_paper_on_blue_eyes_technology.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/sikefejagezukobalesulag.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/70550521684.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/buribimuwame.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/10243426729.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/jarobadujidepan.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0461/files/gilepixazowaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/buku_agama_islam_kelas_11_penerbit_erlangga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/malerofefamizekigo.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_off00007f4d.bin
411cdf490c5ab300a0774bb0702f13f232f694dcf8280e150ea5c9ee75163538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4D 5400 bytes
font_01_sfnt_off000091bd.bin
9b16b7c8745ede4cb194416aa57b47c9268c83f7950ad29197205b860af14009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10364 bytes

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