Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e1bda37a1edb7b…

MALICIOUS

PDF

48.6 KB Created: 2020-08-24 12:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc97c70869abca981fc32c603e957c0 SHA-1: 82dcfa90d59075cf24141fbed382cdcb860de6d4 SHA-256: b8e1bda37a1edb7bf5e583231efdacaaef1e7ea5d9dc2540e31c56902119646c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector (ttraff.cc). The document body, though partially corrupted, contains text related to 'Citroen berlingo dimensions pdf', suggesting a lure to disguise the malicious intent. The presence of a link farm and a critical heuristic firing for malicious redirectors strongly indicates a phishing or malware distribution attempt.

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=citroen+berlingo+dimensions+pdf
    • http://files.chapelbythelake.net/uploads/1/3/2/3/132302896/momobitifu_lolaxenane_kopinekafijofo_dodimi.pdf
    • http://gofiloxot.crackingthehungerartist.com/uploads/1/3/1/6/131636947/4165799.pdf
    • http://merolo.camptesahe.com/uploads/1/3/2/6/132696067/b8b9c90.pdf
    • http://files.warbergoriginals.com/uploads/1/3/1/1/131163683/6211ae1.pdf
    • https://cdn.shopify.com/s/files/1/0433/2273/6798/files/99564824902.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/zarefuratewasiladiguw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/cub_cadet_owner_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/lenorinezizevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/62240488836.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/32141046036.pdf
    • https://cdn.shopify.com/s/files/1/0432/6398/3769/files/vumenar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/74556815719.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/nijogebomur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/girl_guides_promise_and_law_games.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3a.bin
7e140d061a29e65369ae9012471128a91365b75a113e79e397a83627364382ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 5196 bytes
font_01_sfnt_off00007cce.bin
5731b7be787bb41a7843c46f6e463fc4ece29e1985e1962c9c3e69f9fe200d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCE 10476 bytes
font_02_sfnt_off0000a0a6.bin
2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A6 16060 bytes