Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c16e6c6cffe12ee…

MALICIOUS

PDF

40.5 KB Created: 2020-08-09 09:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ef8cec6fe0a7c515323aef97914efd0 SHA-1: 02d658268c5450b709e752fa4826001a4230ac18 SHA-256: 7c16e6c6cffe12ee0912419246f756357ba5e830ae4509ea28497180495491c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary malicious URL identified is https://ttraff.com/pify?keyword=pneumatic+sheet+metal+bending+machine+pdf, which is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign to drive traffic to malicious 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.com/pify?keyword=pneumatic+sheet+metal+bending+machine+pdf
    • http://files.thomasganzevoort.com/uploads/1/3/1/8/131856277/zetijeku-bapamukasefimij.pdf
    • http://files.crossncrown.org/uploads/1/3/1/8/131857390/21981a4748.pdf
    • http://files.wandaslittlehands.org/uploads/1/3/0/7/130739069/morot-zewimefujoneba.pdf
    • http://tukudel.cooksgourmet.com/uploads/1/3/0/7/130776760/lalabojanugozukomoxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8449/6550/files/46557107005.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/akuntansi_keperilakuan.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/pura_vida_beginning_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/macbeth_act_2_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11383010616.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/barepoxuwuxati.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/27067528360.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/memuposupevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/kexek.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/zefududiw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000538f.bin
d83fbbae6a93585b43a5247091241619c58338ae4243cb3b157139e38895c943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x538F 5384 bytes
font_01_sfnt_off000065ad.bin
b55cd8a620885a0442df67bd87bda957bd7e404bab969b78ee7049efbe2852cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AD 9792 bytes
font_02_sfnt_off00008713.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 4324 bytes

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