Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c222ffa2b9aa59…

MALICIOUS

PDF

47.2 KB Created: 2020-08-30 22:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d714418fe253759a017b89a925e9f4f SHA-1: 2bdd4740034bd793d6d91fd99e28231b14750013 SHA-256: 04c222ffa2b9aa591553f00d0b38237dc99b5a2b9971fe31a8b51a2eb9a59775
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to 'ttraff.com' which is flagged as a malicious redirector. This link is presented within text that appears to be a lure for free educational content, suggesting a phishing or scam attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting the malicious intent.

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/wix?keyword=free+arduino+books
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/067ecb_3e820091cdaf4d9fba077cc91d6bfadc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f2323e87bf54026b0bbdf474025b9ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c9f39ed0de14c4eb5c44c0f4445f9c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3e7be759fe04d28b8091b7f5141e79f.pdf
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/72306269202.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/exercicis_categories_gramaticals_i_sintagmes.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/stormtrooper_wallpaper_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/wimen.pdf
    • https://cdn.shopify.com/s/files/1/0437/6798/8376/files/19237077145.pdf
    • https://cdn.shopify.com/s/files/1/0432/7263/4533/files/78756476426.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/vifepibuzag.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/minapelukegewoj.pdf
    • https://cdn.shopify.com/s/files/1/0462/6645/0074/files/school_days_apk_uptodown.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/javoxuliwifera.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f27.bin
cdd14386475333509bc5114218e8f9a3d27178d627bbe3fdc444fc06294cbf62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F27 4748 bytes
font_01_sfnt_off00007f45.bin
d8fa93d6fbb64e46cce719194a8896013759af3c2774cf73cae01313abdf8fa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 10192 bytes
font_02_sfnt_off0000a22b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA22B 4324 bytes

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