Malicious PDF — malware analysis report

Static analysis result for SHA-256 697f8929814fa5ae…

MALICIOUS

PDF

46.7 KB Created: 2020-07-30 15:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac365a432dde7e128d7f472d20b2a53d SHA-1: 28c3b0b0188df917ce0dc88b3407325062eb0332 SHA-256: 697f8929814fa5aeb44dac51492224106036ce077f175eceb22470c0df159547
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'Centrelink job seeker diary pdf', likely to trick users into clicking the malicious links for phishing or to download further malware.

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=centrelink+job+seeker+diary+pdf
    • http://files.royalparkapartments.com/uploads/1/3/1/0/131070331/xebopa.pdf
    • http://files.lacampanaranch.com/uploads/1/3/1/3/131383651/3055960.pdf
    • http://files.nomadicsteve.com/uploads/1/3/1/4/131437538/42cb4690f8.pdf
    • http://files.englishrunnymede.com/uploads/1/3/0/8/130813586/8319774.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/56895034457.pdf
    • https://cdn.shopify.com/s/files/1/0434/5276/0224/files/95776206697.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/57415267789.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/pofidetowadafuvozigo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/96780312619.pdf
    • https://cdn.shopify.com/s/files/1/0435/5352/1823/files/19555186883.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/besaxewokafad.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/somufedigok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007864.bin
c3d340fa5f55eb783ec680dd570d5795a7deeb72ab532df1f5916ae7d8872132
pdf-font-stream PDF embedded font (sfnt) at offset 0x7864 5228 bytes
font_01_sfnt_off00008a3a.bin
92ff9865bf9f2ee1f1de1d129cd4335d1331c18cde3f52db70707778e77e3eae
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 10480 bytes