Malicious PDF — malware analysis report

Static analysis result for SHA-256 012d1dc8fc6ac319…

MALICIOUS

PDF

52.1 KB Created: 2020-08-14 17:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f24dd206a3526142645ecbc103d7cfdf SHA-1: 8444e5c669a60518fb76ae13291e24181f5e7f75 SHA-256: 012d1dc8fc6ac3193a38139121c1f0b57c8769173b94248029eaa5eb3b1539d7
162 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=skin+smooth+brush+photoshop+cc
    • http://nijekob.dutchesshousepatterns.com/uploads/1/3/2/8/132814930/b051f217eaf8d3.pdf
    • http://files.koalaremedies.com/uploads/1/3/1/6/131636654/nubuligimamopekupo.pdf
    • http://files.htradingpost.com/uploads/1/3/1/1/131163718/efdb086061.pdf
    • http://files.kevinportmann.com/uploads/1/3/1/4/131453610/nalado-galabujosafo-kisoxu.pdf
    • http://files.congregationofthemission-un-ngo.com/uploads/1/3/1/4/131437484/6d98c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/ryobi_4_cycle_trimmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/d_d_5e_baby_bestiary.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/4072354534.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/19816362734.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2826/files/korebukasowibiwaro.pdf
    • https://cdn.shopify.com/s/files/1/0438/2821/5968/files/ayurvedic_cooking_for_self_healing_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/javaruxolawizusero.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/47919795109.pdf
    • https://cdn.shopify.com/s/files/1/0448/1450/0006/files/sejotumib.pdf
    • https://cdn.shopify.com/s/files/1/0436/5064/6169/files/doom_3_cheats_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/70447536018.pdf
    • https://cdn.shopify.com/s/files/1/0436/5674/1022/files/47094718215.pdf
    • https://cdn.shopify.com/s/files/1/0440/6021/3398/files/wodawuf.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_off000086f2.bin
6c0f3664a4927b81f5b80891c69484dd7986f30e70ba7c62b09144faf58fe425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F2 5240 bytes
font_01_sfnt_off0000988b.bin
27c9559200c3696bc30fbedcb475116ea8f3ede66faafc430e5d6eeae615c6bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x988B 13392 bytes

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