Malicious PDF — malware analysis report

Static analysis result for SHA-256 703be5cd429a5c72…

MALICIOUS

PDF

51.5 KB Created: 2020-08-20 19:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4555dfbe83b7a5c2b6ae06128063482c SHA-1: 568661a124b8ce1e081f44ec64993b66a139eef1 SHA-256: 703be5cd429a5c728e87a3ac2857a57fd6bc71aa23e35fd9f26c1d94b752f0da
170 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a form or document lure, and the presence of urgency language further supports a phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aissee+2019+form
    • http://files.faithrec.com/uploads/1/3/0/7/130775346/lipobojaxi.pdf
    • http://files.legendscomix.com/uploads/1/3/1/4/131437984/2387046.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0452/5257/5394/files/velocity_and_acceleration_problems_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/81398400424.pdf
    • https://cdn.shopify.com/s/files/1/0447/9077/5965/files/9432230882.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/mesugoboxuzam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/digikujomowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/weezer_say_it_ain_t_so_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/vizio_sound_bar_remote_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4935/files/delitos_contra_la_administracion_publica_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0432/1633/9111/files/85001560638.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_off00007197.bin
d90071a92fba6024b3ce19a94d572ea757dd279ae8d697e8f68a2bb29c2d2719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 5144 bytes
font_01_sfnt_off00008301.bin
d0e95a2f91ce163f89dde17e1c92dc7e18aa1f217632a54ce89557f51e5c4422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 10416 bytes
font_02_sfnt_off0000a6ae.bin
009159cd59ba8cad5eaf511ec027fa3d81ba9753243fda9e05cdb8ee025fb15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6AE 8012 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.