Malicious PDF — malware analysis report

Static analysis result for SHA-256 0312a3c03bd98e5b…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 17:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0ef6fc261ac711d599af1b162ae6526 SHA-1: fdea7fae4dd33a08857cc1a6f63aa76c5988e8b6 SHA-256: 0312a3c03bd98e5b9f3d3ef35ef21cb1f72e9fb55f3321e2fd30fc9004aa7067
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a deceptive title and numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The presence of a large number of external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.com/pify?keyword=baf%25C3%25B6g+formblatt+3, which is likely used to redirect users to further malicious content.

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=baf%25C3%25B6g+formblatt+3
    • http://solijezib.oceanateachbz.com/uploads/1/3/1/4/131438541/debuj-zaronadurutesu-kupepeje.pdf
    • http://vupiv.foxfieldrecoverymission.org/uploads/1/3/2/3/132302868/kanipuwubug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0446/6976/3747/files/bikini_body_training_guide_two.pdf
    • https://cdn.shopify.com/s/files/1/0436/9252/3675/files/lagiranar.pdf
    • https://cdn.shopify.com/s/files/1/0453/2525/4811/files/36988016941.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/allluia_le_seigneur_rgne.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/13645734575.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/25418076048.pdf
    • https://cdn.shopify.com/s/files/1/0433/8371/8042/files/goxorulubodemitozozit.pdf
    • https://cdn.shopify.com/s/files/1/0436/9969/9866/files/pifisabefewofokokuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/latest_android_version_name.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/68798248792.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/varonupotomazalawimep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/82908613024.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0094/files/zoriwodedofapuvuwi.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_off00005e8f.bin
60e662012394344ec05e2a93e72c448f01de2e8eff0b59c398ed7cd17ca2d4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8F 5400 bytes
font_01_sfnt_off000070a5.bin
40bf95ba935c1dcf9adaeb259e5601cd3cb40ed1f38bb057e901e4f9c62930d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A5 10972 bytes

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