Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1890d0acbd38a4…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 00:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31719bd41dfac695453a23277eeea3e1 SHA-1: bd647fee771114d1a16c782babbdc3896c9fc64a SHA-256: 0c1890d0acbd38a4776c12acc40afa445e06e8e4fcabff75b1fc585a5b40d3dd
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true destination. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=avplayer+stop+ing
    • http://pegin.darebritannia.com/uploads/1/3/1/1/131164250/vosafi-doditotajo-luzipizugux.pdf
    • http://bijabevaz.therapyinnovations.net/uploads/1/3/2/3/132303189/7696333.pdf
    • http://files.jessicabrownmusic.net/uploads/1/3/1/6/131606343/turaterosotewip.pdf
    • http://files.communitycoc.org/uploads/1/3/1/3/131398367/jusino_didekatemo_lipamezikapanu_fesedosifa.pdf
    • http://diguz.dental-public-health.com/uploads/1/3/1/4/131482952/vagavigik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/jotakubasolawuwigobitak.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/bavifipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/jizugesajalawexit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/jupunurejanewod.pdf
    • https://cdn.shopify.com/s/files/1/0436/9167/1705/files/33516948443.pdf
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/duniwivi.pdf
    • https://cdn.shopify.com/s/files/1/0444/1587/7287/files/benim_hocam_tyt_matematik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/antenna_design_basics_pdf.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_off00005e85.bin
c3c3f50854d9832eaeb57ce254569932e80c782ea547ab6a09181562300e6eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 5140 bytes
font_01_sfnt_off0000701f.bin
faf7b17a039cce308c5959a16bd780b8cbfba5cb355629caef3591106343e2f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 12800 bytes