Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5eabc78957786bd…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 13:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce358103f7c8effd2c030b3397c3a54a SHA-1: 8dff2c2a8dda8677cd7958b0646045348005ab60 SHA-256: c5eabc78957786bd7d947facf12eb0915ef6f941c31fb4bc16e812f4d6cc206b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'breach of contract notes pdf' and includes the malicious URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the 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=breach+of+contract+notes+pdf
    • http://files.icanillustratemybooks.com/uploads/1/3/0/8/130813526/pivufi.pdf
    • http://files.risingmeadowpottery.com/uploads/1/3/2/6/132695701/nuwinat_kikaxurex_tefovenupegise_gitowag.pdf
    • http://zikod.weavingswellness.org/uploads/1/3/0/8/130874493/lifato.pdf
    • http://nujok.skincarebyjewls.com/uploads/1/3/1/3/131383775/45bc9c.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/jowedoniwagup.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/general_biology_2_grade_12_module.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/notivunojepogiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/8068/7524/files/defosexokabexujuboketavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5575/files/34756941671.pdf
    • https://cdn.shopify.com/s/files/1/0437/7142/9016/files/cursive_capital_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/asme_b36._10_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9367/1588/files/les_analyses_mdicales_du_sang.pdf
    • https://cdn.shopify.com/s/files/1/0432/9711/2219/files/bobodobulud.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/fuvuwefirizenir.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_off00006142.bin
75c06b57399aeeed1d63d9b1f60d574851a0089c2dcc9824fb9301ad8a6b7b64
pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5260 bytes
font_01_sfnt_off0000731c.bin
05c94febf196bdd0f0ab406483c668190ab02fcca7012132ecd8ec5a78069314
pdf-font-stream PDF embedded font (sfnt) at offset 0x731C 10208 bytes