Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f230692c495cb3…

MALICIOUS

PDF

34.4 KB Created: 2020-08-12 10:06:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5d108753086d73f83f9e3711bf8225 SHA-1: e212071c2b8650c23f7af5cbd784d8ab987eba5d SHA-256: b1f230692c495cb33cc75882d9a33166fca18c4555b0830197733b36ed75a1f0
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The primary malicious URL, 'https://ttraff.cc/pify?keyword=bilbao+street+map+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the redirector URL and other Shopify-hosted PDF files, suggesting a coordinated effort to distribute malicious links. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=bilbao+street+map+pdf
    • http://tumixireg.camplakeoutfitters.com/uploads/1/3/1/4/131454024/famafenujojeto.pdf
    • http://files.ladlesofhope.org/uploads/1/3/2/6/132695663/pesadalod-kodekavege-josigoloj.pdf
    • http://files.frankrostron.com/uploads/1/3/2/8/132816041/a3195bf2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/70334712398.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/64488159279.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6682/files/hex_editor_pokemon_battle_revolution.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/maleroburesoni.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/zopusezupakotigovurokibut.pdf
    • https://cdn.shopify.com/s/files/1/0438/3847/2357/files/rabefafovoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/9089706141.pdf
    • https://cdn.shopify.com/s/files/1/0439/2891/2040/files/koveza.pdf
    • https://cdn.shopify.com/s/files/1/0439/1341/2760/files/jixoruvudalefobajaxuwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/84651843112.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/fuxozerizosewik.pdf
    • https://cdn.shopify.com/s/files/1/0434/1389/7368/files/sample_bash_script_for_generting_replicas.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_off000048fb.bin
3e234ce8feb1aefd1209f14f829922fac07d1e785cc68ddf5143b61dd7ef5c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x48FB 5376 bytes
font_01_sfnt_off00005b13.bin
26a26b03766952eb4bf2519fc994c6c38f7789a678b736c32cf826dd5ffd568e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B13 9984 bytes