Malicious PDF — malware analysis report

Static analysis result for SHA-256 44201174eaea3780…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 08:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2029cb864851427a0975d5f92424709a SHA-1: 4029858a5cb376f171a97d8533ae2451fa7a75e6 SHA-256: 44201174eaea37804dc6c713b34dbfd55fe2536d7f5db892f9353edc9325e83e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a psychology PDF download. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF. The document body, though heavily obfuscated, contains the URL that is also flagged by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic.

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=definition+of+behaviour+in+psychology+pdf
    • http://files.mslaneapgov-econ.com/uploads/1/3/1/8/131872021/robaj_seteguninanivew.pdf
    • http://files.siglapircc.com/uploads/1/3/1/3/131380292/gaxazu_wikogewiweviva.pdf
    • http://vemewosix.beverlychow.com/uploads/1/3/2/6/132696194/filukosebi_subaraponexove_jefasar.pdf
    • http://luzimon.chipgeorgia.com/uploads/1/3/1/6/131606346/30cfabe3.pdf
    • http://files.kathysartplace.com/uploads/1/3/1/4/131406840/7d200f165cac4f6.pdf
    • http://files.siglapircc.com/uploads/1/3/1/3/131380292
    • https://cdn.shopify.com/s/files/1/0433/5009/8085/files/16976717260.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/77782187593.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bivunamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/international_trade_and_balance_of_payments.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/martial_art_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/mario_flash_games.pdf
    • https://cdn.shopify.com/s/files/1/0432/8846/1478/files/adobe_animate_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/tupuxopaxamasinex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/sphax_tekkit_legends.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/legibeguximafasajati.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/67191336901.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_off00007e5f.bin
a457419a938752a786810eac48a4e5fa7a1965440be06bccda6d557a6a5819a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 5716 bytes
font_01_sfnt_off000091df.bin
3bc6e7cfa3169509dc31f38b633ac97d3d7cfc578fc60288c652a0fcbe38efbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DF 10104 bytes

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