Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba01814612b7b32…

MALICIOUS

PDF

45.1 KB Created: 2020-08-23 21:39:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7df7adb151ec771a20cf8a6924139d1c SHA-1: 6e6033b175fafc7d4aad417326f88c2f021f894b SHA-256: 6ba01814612b7b32d0944f86928d3210f222f800bcc30ca89e9835b7ab5a1ade
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'school excursion report writing' and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or malware delivery attempt.

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.ru/pify?keyword=school+excursion+report+writing
    • http://files.futuresparkcoaching.com/uploads/1/3/0/8/130813667/redubarugizixi_kixuzorutusexat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/clarinet_and_bass_clarinet_duet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/1030/8766/files/aashto_method_of_flexible_pavement_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/0733/4810/files/wakerabel.pdf
    • https://cdn.shopify.com/s/files/1/0434/9824/2214/files/51697948904.pdf
    • https://cdn.shopify.com/s/files/1/0429/8014/7359/files/gikamidaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/6296/5912/files/15495355874.pdf
    • https://cdn.shopify.com/s/files/1/0437/3174/6967/files/rig_veda_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/niwuwukanezex.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/jukilanogabezigizekesi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/bergey_s_manual_of_determinative_bacteriology.pdf
    • https://cdn.shopify.com/s/files/1/0461/8148/2649/files/sodium_naphthalene_sulfonate_formaldehyde_uses.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/78693506258.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/62523567618.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/42770803386.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1296/files/4592316517.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_off000066b1.bin
95004fc0ec949a18a5d134cf537cf2e65c5906463da8eb1bdbac63f51fbed7a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 3360 bytes
font_01_sfnt_off000072b7.bin
71a3c88446a30e1d68be1f08c0a3ba6449697e2d73c90ab1bd80c515ca457f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B7 5248 bytes
font_02_sfnt_off000084a1.bin
4d0776aaa3994ec2574568622a2cbda30244c3e62b9c4f788db3b24b33fdf064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A1 10112 bytes

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