Malicious PDF — malware analysis report

Static analysis result for SHA-256 776d9830613b2585…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 23:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 287f7bbc59c5c3501b2db837d87c717c SHA-1: 2a5ec634ee7c351044043a6077c771d422234c44 SHA-256: 776d9830613b2585eb295f69a9daa8dc790e576f6c3b991895b70ec6487c6300
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body, though partially corrupted, contains the same URL and references to other PDFs hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards a social engineering attempt to trick users into downloading further malicious content.

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=dichiarazione+di+conformit%25C3%25A0+catastale+pdf
    • http://files.fnaq.org/uploads/1/3/2/6/132681304/8836484.pdf
    • http://files.wyomingspeechlanguagehearingassociation.org/uploads/1/3/1/4/131409709/fudokef-kagiwomajapaj-xixamez-vipajadimagom.pdf
    • http://files.doublemindedgod.com/uploads/1/3/0/7/130738531/86eeee540.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/10963171390.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/brche_addition_und_subtraktion_aufgaben.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/lg_portable_air_conditioner_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/zajewezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/bipolar_assessment_tool.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/list_of_words_with_synonyms_and_antonyms.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/kumimerujewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/basic_construction_math.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.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_off00005ead.bin
ef4a10bed2f5bef6e87ed3ec88b435ec1450c925ce4b8b811bf897708edbe54a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 5680 bytes
font_01_sfnt_off00007153.bin
975b803dfeec38eee71f70668ee734d68a1171f54549c8d94ecd9eff23dda773
pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 10316 bytes