Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fd027cbd6c5979…

MALICIOUS

PDF

45.4 KB Created: 2020-09-04 20:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aaed81aab99cba638ff56c1677bb00c SHA-1: eeff98ac134db0924c51d5d34f841f19c47873cc SHA-256: 06fd027cbd6c59798a11ab49a91734b67473a20c457640ff7e1700905f655949
154 Risk Score

Malware Insights

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

This PDF document contains a link farm, with one primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous links to benign Shopify-hosted PDFs indicates a potential SEO poisoning or link farm tactic to mask the malicious redirector.

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.me/wix?keyword=kotlin+android+adalah
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/5183/5811/files/92361117841.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/megaloblastic_anemia_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5522/files/pharma_sales_resumes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0056/0803/files/16269167065.pdf
    • https://static.usrfiles.com/ugd/ef7486_18ccad89056544b697f43f037129df51.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6162e7ae99f4d2786f0eabd5d9605a5.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/anexar_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/creche_business_plan_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/defijetewinenuvag.pdf
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/21440633461.pdf
    • https://cdn.shopify.com/s/files/1/0457/6899/9078/files/52168219636.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_off00006505.bin
28ee19b69fdad1fff3f9c1c1026a14c04c196a3cd355247141c23d61f70a09eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6505 4376 bytes
font_01_sfnt_off000073c4.bin
ef43ae9c6c2186c0e33832b92867b3a7ca69286ce10d81653f4f58d270caecbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C4 12200 bytes
font_02_sfnt_off00009b79.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B79 4324 bytes