Malicious PDF — malware analysis report

Static analysis result for SHA-256 517d0b1c90ae3605…

MALICIOUS

PDF

45.1 KB Created: 2020-07-27 17:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f06a2470204100a7939115d64bddfda0 SHA-1: 85fc5956a86c7174184f031029e1fc6d9722c4f9 SHA-256: 517d0b1c90ae3605f9ae5c97726bc3367db36393ac7e1eb926dea8ceffe749cf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.com/pify?keyword=hungry+dragon+hack+mod', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its direct lure.

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=hungry+dragon+hack+mod
    • http://files.brosmakingadifference.org/uploads/1/3/1/6/131606537/143fe73de16d.pdf
    • http://files.gentlespiritdoula.org/uploads/1/3/1/6/131637024/rilezure.pdf
    • http://files.societyofstbrigid.net/uploads/1/3/1/0/131070051/fezuduxo.pdf
    • http://files.baughmanbuzz.org/uploads/1/3/1/4/131406412/titozotuxakaruta.pdf
    • http://files.baltimorereadaloud.shop/uploads/1/3/1/3/131380754/371728.pdf
    • http://files.ba
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/fazetuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/94778808448.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/67498588983.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/gilidakoxotusugupob.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/parakipolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1644/files/kumozukenukiwaboludibifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/64116527336.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/wesizusozobudakojidetofu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/85570591208.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/gekujokebofo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/nejawotigejodesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4546/1909/files/kixabimokozitasaga.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_off00007511.bin
877fc0950cf61941e4bcda9f84c23fde357a75bdf3f2dc35962ea2e142771987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7511 4904 bytes
font_01_sfnt_off00008579.bin
a188c695d94471a0b103045262ef34731f8058faf1b439553b3f5346bef424f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8579 9948 bytes

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