Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8cd16d2aae006e…

MALICIOUS

PDF

34.3 KB Created: 2020-08-20 05:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2936dc468a9ee845660e9eac9cf953e0 SHA-1: 884147975be011c3e24ed715769410b93be1232d SHA-256: 8e8cd16d2aae006e848cce64cad5d7ae810f0f5564c4d671e116bb5b7dafc2e5
154 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 redirects to 'ttraff.com'. This URL is flagged as a malicious redirector. The document body contains the same keyword as the redirector URL, suggesting a lure. The ML classifier strongly indicates maliciousness, and the overall structure points to a link farm used to obscure malicious destinations.

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=motu+patlu+cartoon+movie++2018
    • http://files.michellekaley.com/uploads/1/3/2/6/132682904/banojiluruxep.pdf
    • https://cdn.shopify.com/s/files/1/0438/5252/9829/files/sapemibakodekitopom.pdf
    • https://cdn.shopify.com/s/files/1/0435/8828/8670/files/ketorolac_eye_drops_prescribing_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/rusalolan.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/use_of_english_words_in_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/72001057876.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1904/files/65179525990.pdf
    • https://cdn.shopify.com/s/files/1/0437/8987/7405/files/azbox_eurofarma_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/family_tree_maker_ancestry_free.pdf
    • https://cdn.shopify.com/s/files/1/0465/2800/4254/files/accessibility_android_off.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_off0000478f.bin
9b57b60badb5506869082c6c7d793891f3c8ffbba5f9b32ce4f295450be82690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x478F 5484 bytes
font_01_sfnt_off00005a31.bin
888aedf7829904cbd1fe845d0ae76b9bf724a63713eae4bf2979e975ec72b1ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A31 10104 bytes

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