Malicious PDF — malware analysis report

Static analysis result for SHA-256 654ca61c4c0068cd…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 17:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f2027ed8fca5513d04d95666e661f59 SHA-1: 44b338dda9f184f8071295a19fa8577ec401df9c SHA-256: 654ca61c4c0068cd544caa276164080445263d94bf003ed3a5575ef4ec063a15
154 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially obfuscated, includes text suggesting a lure related to an "Eia crude oil storage report" and contains the malicious URL. The presence of numerous external PDF links, as flagged by 'PDF_SEO_LINK_FARM', further indicates a campaign to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to a malicious URL.

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=eia+crude+oil+storage+report
    • http://forigul.ncgconsultants.com/uploads/1/3/2/8/132816066/8349573.pdf
    • http://tujawad.progressivebrick.com/uploads/1/3/2/6/132681946/zukojumi_tosujomupatozu_totip.pdf
    • http://files.theartboxstudio.com/uploads/1/3/0/8/130815014/19af2b6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/92732824794.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/38957372730.pdf
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/59005346311.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/gakisud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5718/files/gajowenolutas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/sujunupinala.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/55503632582.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/hyundai_accent_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/calendario_laboral_2020_las_palmas_de_gran_canaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/9390/8892/files/quran_word_meaning_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1187/4716/files/76362722490.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/sevoxeruwevovikaluwuxek.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/arnold_ehret_mucusless_diet.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_off000061d2.bin
64ba1eb69b5f1c82d7c96e1efe0c06f3c4a8fa8c5891d9e22f2ac0291aa8ad3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D2 5200 bytes
font_01_sfnt_off00007388.bin
d8f53ef8862abbe932424a15f9ed867f44789fc2593e166c3205b01590e92b1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7388 10380 bytes

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