Malicious PDF — malware analysis report

Static analysis result for SHA-256 8733a1c43915c284…

MALICIOUS

PDF

39.3 KB Created: 2020-07-26 20:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc3b50ea995a486e43c60018e1e253f SHA-1: ffaf10e648893694f545c8af328d20f0b4448e58 SHA-256: 8733a1c43915c28412cab6fd8c32a7df1c42b3a1733afdced2f31920458ead7e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to a link farm. The document body, though heavily obfuscated, suggests a lure related to a 'millipore stirred cell manual'. The presence of a malicious redirector and a large number of external links indicates an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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=millipore+stirred+cell+manual
    • http://files.heffernanfoodconsultant.com/uploads/1/3/1/4/131438329/xupoved-rinojotegun.pdf
    • http://files.rosalindstefanac.com/uploads/1/3/2/3/132302802/xawavo-wupopopowipik-vomaguxasan.pdf
    • http://files.mmtimage.com/uploads/1/3/1/3/131379540/tonazi_bagudisegelopu.pdf
    • http://files.hbkirkpublishing.com/uploads/1/3/2/6/132682758/risiraxuzemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/47440073274.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/dibabitewojatakot.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/nexiwadoxonigadodekuvifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/77293540169.pdf
    • https://cdn.shopify.com/s/files/1/0431/3369/8209/files/lijeduka.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/mubiwaberopuseridapisop.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/taxorixezo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4742/files/vireb.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/64210859576.pdf
    • https://doi.org/10
    • 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_off00005b9e.bin
09fbd6ecf102970b594bb18e371ffb683555876cc4a3ff2759f5db69e7e2b44c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9E 5104 bytes
font_01_sfnt_off00006cd4.bin
b3087702a0043a515531f41c4d9a812623e08b54c86f5578bb60fcd0ad25d4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD4 10384 bytes