Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0460615f399d41f…

MALICIOUS

PDF

33.9 KB Created: 2020-09-19 05:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55867eb0989255463c99ee3b53aafb00 SHA-1: 53202585f388dc40bcf33fa9bb103c042cf5c6c5 SHA-256: b0460615f399d41f4bc040daf15ec2983beef6ee2b0a7201d24e04a6bba43eed
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the presence of malicious redirectors and a link farm, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting the primary goal is to drive traffic to malicious sites.

Heuristics 3

  • 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.
  • 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.club/wix?keyword=extra+practice+graphing+rational+functions+worksheet+answers
    • http://bilunobon.iscariotstories.com/uploads/1/3/1/8/131858530/dosurusuvukivuninol.pdf
    • http://files.nerissalee.com/uploads/1/3/1/4/131437859/dudovedotewonifu.pdf
    • http://files.cafutahwing.org/uploads/1/3/1/3/131380171/54cf4.pdf
    • http://files.thecovenantschristandyou.com/uploads/1/3/1/3/131379434/94345039.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/dark_souls_3_rings_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/quick_video_recorder_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/guliwunokoponedisu.pdf
    • https://cdn.shopify.com/s/files/1/0462/6618/7933/files/oxford_bookworms_library_level_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/nergies_renouvelables.pdf
    • https://e097b6fa-20fd-4572-bee3-27d439b5e938.filesusr.com/ugd/efb3f0_a388d6f55ee7463f8a0a096464d51d75.pdf?index=true
    • https://044aad9e-53d1-44cc-b263-bfd213c5328f.filesusr.com/ugd/4329d7_bfd527390d834bf6a27cc3926c176715.pdf?index=true
    • https://25d6b42b-a70c-4f14-ba71-2cd1e771c81d.filesusr.com/ugd/b148e5_a62a824b05ce4d9982e1ab780887761a.pdf?index=true
    • https://567e896e-638a-4f16-90bf-bbe3e0ba4315.filesusr.com/ugd/031dda_4fd3d5f112604786bbfd67f3ad60c4c4.pdf?index=true
    • https://38726551-1160-486b-9d52-3cb6184844fa.filesusr.com/ugd/0010c8_e453975b5d794466b4943963ba9c24e6.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/5506/8837/files/japanese_journal_of_infectious_diseases_author_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/xojezoverererekim.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045f9.bin
6e0b3d62ba59177b243693c2779a2427279bc3d60e632610869dad5e2336e379
pdf-font-stream PDF embedded font (sfnt) at offset 0x45F9 5460 bytes
font_01_sfnt_off000058a8.bin
8da6cd16028e50c85a1ae506b75181a036446d3102a448e672a583ec9296f8e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A8 10236 bytes