Malicious PDF — malware analysis report

Static analysis result for SHA-256 06991494c1e8717a…

MALICIOUS

PDF

55.0 KB Created: 2020-09-07 13:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6afdb590d8ee6505d817b7313b2ef641 SHA-1: 3ad887819eff2f11c44efe659834f6b12f1fcce0 SHA-256: 06991494c1e8717a4689910a22feadc0a1e414ef0982574313d4fda071dee61b
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, a technique often used for SEO manipulation or to redirect users to malicious sites. One such link, 'https://ttraff.link/wix?keyword=environment+and+ecology+notes+pdf+for+aktu', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a malicious intent, likely to drive traffic to malicious infrastructure.

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.link/wix?keyword=environment+and+ecology+notes+pdf+for+aktu
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/efc97f_570d49da4fa04ddf9279ebc13cfccbbe.pdf
    • https://static.usrfiles.com/ugd/418e76_c691e9bc3016472aadd2af08e306db68.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ede4d68659f408ab4f3a4858bdffa19.pdf
    • https://static.usrfiles.com/ugd/238140_264727fe305d4ea4beb49010887794db.pdf
    • https://static.usrfiles.com/ugd/2ddd39_473e49904dde4fce8de016e254ba9e6c.pdf
    • https://static.usrfiles.com/ugd/0a593f_9424fc985a3441bea24057d53a60535e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b36da7f45eda4edb958604127dab88e4.pdf
    • https://static.usrfiles.com/ugd/eed56f_811105a2057243348258f1c266eac24b.pdf
    • https://static.usrfiles.com/ugd/b11f6d_23a0fed25aa44f1d993c4e44bf9a985f.pdf
    • https://static.usrfiles.com/ugd/e42ee3_043ec3e764814f7cb03a334d25669758.pdf
    • https://static.usrfiles.com/ugd/4bb894_14a858c1cae449b2a9377685ca65f37d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/51279588217.pdf
    • https://cdn.shopify.com/s/files/1/0428/5700/5215/files/fujawujife.pdf
    • https://cdn.shopify.com/s/files/1/0431/8711/0037/files/79567165980.pdf
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/caccia_al_tesoro_per_ragazzi.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/lacoste_shirt_size_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070ac.bin
81c63981b30da4fd8a7c034696fc41e351b03d30e2fd5fa7692bcf9214d06461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AC 5540 bytes
font_01_sfnt_off00008374.bin
9d6973445325756fc8cb8c1be4d5d2971d56389bd495a709a658a5acd5286541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8374 5948 bytes
font_02_sfnt_off000097b7.bin
e6df2bd86e0ddd365cf356f6246ea6bc989913d096b38b97ae5c0c9e877b2014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B7 12556 bytes
font_03_sfnt_off0000c00b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC00B 4324 bytes

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