Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecfbb0ec7856825…

MALICIOUS

PDF

44.9 KB Created: 2020-07-30 07:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e90415e01a38336a93e6344c5f7d6b SHA-1: e4ba4cd94da270aa3869a550899e825d11bf8654 SHA-256: 7ecfbb0ec7856825cd6da737321785e7c22cc8837351629cf0d8ec1330c5bf96
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to compromised Shopify domains, suggesting a link farm or SEO poisoning attack. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious destination. No scripts were extracted, but the structure and heuristics strongly indicate a malicious redirection 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.com/pify?keyword=general+zoology+miller+pdf
    • http://files.baysideoakland.com/uploads/1/3/2/6/132695887/79653d63.pdf
    • http://files.totalvolumeagency.com/uploads/1/3/1/1/131163669/36417.pdf
    • http://files.alaskabg.org/uploads/1/3/2/8/132814371/685007.pdf
    • http://files.westsideyouthministry.org/uploads/1/3/1/3/131380456/xalegir.pdf
    • http://files.theurbangardeninitiative.org/uploads/1/3/1/3/131380158/sazedofuli.pdf
    • http://files.baysideoakland.com/uploads/1/3/2/6/13
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/zisewewo.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/punidadopib.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/bedunagozivadarital.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5224/files/79962451420.pdf
    • https://cdn.shopify.com/s/files/1/0438/2448/0416/files/kakoredopejimabom.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/simifogowobabew.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/41106812487.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/73960469116.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/29847234478.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1103/files/libesepegive.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/97992523789.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/52507930860.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/fosizolazulefobunamux.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/relupivewufewafalutugeli.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_off000071f8.bin
66b35bd9f17fd9b4d6118b3046cd266d7cc268cdd390d7a868315eee13aa0003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 5072 bytes
font_01_sfnt_off00008328.bin
5d6e06772b2acdf55f0cc21f54a4ed0826d5ab2c7b0c087bcb267bb3cc7e4d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8328 10488 bytes

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