Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e46dda90f55ac2c…

MALICIOUS

PDF

39.7 KB Created: 2020-08-11 04:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf92c2743681b4fc8df25fbd41d2576e SHA-1: fe94f8a3fe91664cb57d25249810f25f5ad70cc3 SHA-256: 2e46dda90f55ac2c8479478eb2efb6c61dcbec9078d099ce731399efc3980c3c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body, though obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user to 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=cursive+alphabet+chart+with+directional+arrows+pdf
    • http://files.heramoon.com/uploads/1/3/0/8/130873922/6469462.pdf
    • http://files.transcultural-care.com/uploads/1/3/1/3/131383648/riwesuji-wezadu.pdf
    • http://files.manchesterlifestyleawards.com/uploads/1/3/2/8/132814241/9a9a9.pdf
    • http://diredogi.butternutconsultants.com/uploads/1/3/0/8/130814058/23cc42.pdf
    • http://vuxonuv.virginiaintegrativeosteopathy.com/uploads/1/3/1/4/131407005/749817119.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/sotosaliwojitalusupax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/madugorivikefedulij.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3008/files/49243389054.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/4641292863.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/32556071389.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/canon_eos_rebel_k2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/94904169907.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/botw_swift_carrot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/35508111661.pdf
    • https://cdn.shopify.com/s/files/1/0432/4071/8496/files/59381814871.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/sunojupilelirajada.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/efftronics_interview_questions_for_ece.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/bearing_catalogue_skf.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_off00005413.bin
1ad6a9fff017c86b48887953a3caf756789015d085b2c6de4c520e22620d1b4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5413 5440 bytes
font_01_sfnt_off00006696.bin
21a744703a0c07059fcfd80f763183a39fddcaa8a4712e7408bf2ae58b90279b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 13772 bytes