Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e0e4e7b41eec0…

MALICIOUS

PDF

60.4 KB Created: 2020-08-31 04:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 714789908671cc9222e79d76b5d23231 SHA-1: c56f02d7ab17305c1530934aa8ac6bad1e9e96a6 SHA-256: 722e0e4e7b41eec0ecf23ac58e9fed94094a54a931190749b64009ed3afd7026
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and contains embedded links. One of these links, 'https://ttraff.cc/wix?keyword=ielts+academic+writing+task+1+structure+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning tactic.

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/wix?keyword=ielts+academic+writing+task+1+structure+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3533/6605/files/34336841488.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1038/files/steven_curtis_chapman_cinderella.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/pegesejibinuladikenegepog.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/xajezatiwavim.pdf
    • https://static.usrfiles.com/ugd/cac9e4_4160cae6378c45a69a69625fc80efdb4.pdf
    • https://static.usrfiles.com/ugd/d94ae5_7bc18ebf545c449d9dd7cc3d0bea08f4.pdf
    • https://static.usrfiles.com/ugd/5b9a87_35cdf5d8ddb244aab4872cb6b35ffef1.pdf
    • https://static.usrfiles.com/ugd/8d57bd_ca200065bd2a49cb8ba197b02023058f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1229d99cadd74615a225a1d4375d81ec.pdf
    • https://static.usrfiles.com/ugd/73f3b0_a7b416c19f5b45dcaa2b5ce63a0f372e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc452fa2eb70412d8e14ec26c9e38961.pdf
    • https://static.usrfiles.com/ugd/63d3ad_fec9cc2ab3bf43bd97a89aac9a5eb536.pdf
    • https://static.usrfiles.com/ugd/cf79db_169a414733ee44cbb6cbba77b4c971ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0f8ea63f4914060bdd63a13a00a6487.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae4a.bin
b1318290ece3c0cf9b339291151cfb0097a587d99d22d8ff7ad59a12af382970
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4A 5620 bytes
font_01_sfnt_off0000c16e.bin
3503d689ea1a6f6f6d7ef0fe48a6a331545602cef332f68d51c2a24c4643a0d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xC16E 10352 bytes