Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc9b0500312d0db…

MALICIOUS

PDF

45.3 KB Created: 2020-08-17 14:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2c0c689adf713fbb766d488690f549e SHA-1: cac50e4a4248235650e1de401b21d5b46117632e SHA-256: edc9b0500312d0dbcb54601cbef087ca5a6d26ec7eb2728b25a4f2ad2325932a
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a "bearded dragon fact sheet pdf". The document body and embedded URLs indicate a link farm strategy, likely to redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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=bearded+dragon+fact+sheet+pdf
    • http://biwabuv.marlousdesigns.com/uploads/1/3/1/6/131637649/89a393349a.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/nogiripadowenap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5639/7474/files/mapure.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/wewive.pdf
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/fundamentals_of_equations_of_state.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/botelatudesaxugig.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/12039105090.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wijabogose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/fifagetejitope.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/after_livro_5_baixar.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/getupoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7203/files/vezonojukubox.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_off000072e4.bin
11f8fa1d5c2b2eff6a5b5ea91f0c6fb1f026bc8cc680415201dbc174b75223c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E4 5432 bytes
font_01_sfnt_off0000855c.bin
c75572a64a44f0a2d58a2c87f2ad90d56311d7af79ad4343ba725a13fc2b4fc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 10352 bytes

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