Malicious PDF — malware analysis report

Static analysis result for SHA-256 341c6bae81f7e6f1…

MALICIOUS

PDF

47.1 KB Created: 2020-08-10 02:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98018464f55f11de0dd8a4f5917b87f1 SHA-1: 406de0a9a9230a2ce6405b7adaa1f493bcb9df23 SHA-256: 341c6bae81f7e6f1deee392311c014794c1a331020240056b30f42dc4d16aea8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=adagio+baermann+pdf. While many other URLs are present, they are predominantly benign Shopify links, suggesting a link farm or redirection strategy. The ML classifier strongly supports the malicious verdict.

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=adagio+baermann+pdf
    • http://files.westtechmobile.com/uploads/1/3/1/4/131406412/4587864.pdf
    • http://files.guadalupeblinds.com/uploads/1/3/0/7/130775950/lonipapipedu.pdf
    • http://zibet.normajeanreiki.com/uploads/1/3/2/7/132740214/512585a828.pdf
    • http://files.goodspeedwatches.com/uploads/1/3/0/7/130738998/moriwizexametovex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zadolodiwifunum.pdf
    • https://cdn.shopify.com/s/files/1/0431/0509/1745/files/21562721619.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/8189065164.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/rachel_steele_favorite_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/zafofusezunixekijusavo.pdf
    • https://cdn.shopify.com/s/files/1/0447/3965/7879/files/carbonation_of_concrete_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/xutenerigoxegejim.pdf
    • https://cdn.shopify.com/s/files/1/0440/1666/4734/files/sijupifez.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/a_gift_of_fire_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/12125720125.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006540.bin
fb7db4f080742aaea876c5ec6a6feb535b1b7d99a1b75e52fde515de6441dc4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6540 5280 bytes
font_01_sfnt_off0000771e.bin
0224ce9a520ae7aafdfaa15328fe669d73a339603a57de92dc922ddb980a2d47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 10408 bytes
font_02_sfnt_off00009a3f.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3F 16120 bytes

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