Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1d1fccfc3906c7f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 03:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2209d686b032385bbe2360cd4c3d346f SHA-1: 6319f0cb6b031e9ce1eddfbbaf4f4afb9e182ed2 SHA-256: c1d1fccfc3906c7fe3b24f13c9f37c358c4f43e3e6260f8f519f79c9cc88f199
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Fraser and Neave annual report 2014' and the malicious URL, suggesting a lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. The ML classifier strongly supports the malicious verdict.

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=fraser+and+neave+annual+report+2014
    • http://files.hoopstraining.com/uploads/1/3/2/6/132681391/wudevaw.pdf
    • http://files.autoconnectionplus.org/uploads/1/3/1/6/131606844/setuvuzejorami_lidelizo.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.squidflip.com/uploads/1/3/1/0/131070011/sezemu-superezor-fobagin-barefonolukem.pdf
    • http://letawema.sarahsullivanwriter.com/uploads/1/3/0/8/130814788/xuxemukunulavem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/tous_les_analyses_du_sang.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83260340608.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/bavuxoxipitategujid.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3701/files/list_of_irregular_adjectives_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/22246945086.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/jezigena.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/basics_of_stock_market.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/xowewodefovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/viloseti.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_off00005cbb.bin
ffa882100a4893b0582939e3b0be1558fe27517cf78bd94fdac2d8f05e5b353c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBB 5380 bytes
font_01_sfnt_off00006f24.bin
4e32c06db929ce9af50bd3253919be07f0b97346662efa365846ae909f6cbf13
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F24 10736 bytes