Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4eaf68e2a1dda2…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 00:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f762b2a7625ccfbc4250926b5fbcd058 SHA-1: bea00244ea147bcab42a662f178ba16f2eb6476b SHA-256: fa4eaf68e2a1dda26e80d47fae9bee38912d78aa665dc8bbb9db9045cd22f0f1
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous links and the critical redirector URL indicate a phishing or redirection attack.

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=action+words+worksheet+for+grade+2+pdf
    • http://files.harpercc.org/uploads/1/3/1/3/131379820/7785554.pdf
    • http://files.angeliquestrausheimdesigns.com/uploads/1/3/1/4/131408086/fakeziw_watoz_foxav.pdf
    • http://files.fullerland.us/uploads/1/3/1/4/131407704/978613.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/54933528607.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/86292278436.pdf
    • https://cdn.shopify.com/s/files/1/0429/7841/0655/files/6733871760.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6886/files/wutetipatidased.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/oxford_word_skills_idioms_and_phrasal_verbs_basic.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/traduzione_amleto.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9730/files/74576089969.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/udp_tracker._openbittorrent._com_80_announce.pdf
    • https://cdn.shopify.com/s/files/1/0437/6107/4333/files/area_of_basic_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/2017_vw_gti_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/menejefage.pdf
    • https://cdn.shopify.com/s/files/1/0433/7709/8915/files/44640381412.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e5f.bin
9ad123bfdb912c89da2d3838e9448d522d68a886ebd75ceebc6d61ca9c4cf584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E5F 5452 bytes
font_01_sfnt_off000060e8.bin
3b6c4dbf02ca6d1556894ebd71f2907ba2c91175c7ea443ff6df136ec5ce8b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E8 9876 bytes
font_02_sfnt_off000082af.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82AF 4324 bytes

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