Malicious PDF — malware analysis report

Static analysis result for SHA-256 925d10c4c96ba30b…

MALICIOUS

PDF

46.6 KB Created: 2020-08-30 16:23:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efa208c6c05d126edb3101309714e060 SHA-1: 2a436d9b5817d767952efaa03fe292f2abb8a82e SHA-256: 925d10c4c96ba30b6fac1d2e44db8f2cdd7bb5adc12ad67703c4e58e3f733116
152 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many of which point to benign content farms on Shopify. However, one critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'ttraff.me'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=warhammer+40k+8th+pdf', suggesting a lure related to 'Warhammer 40k 8th pdf'. The presence of the malicious redirector strongly suggests an attempt to lead the user to a malicious site.

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.me/wix?keyword=warhammer+40k+8th+pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/agile_testing_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/3179115928.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1688/files/norigoxupivifenel.pdf
    • https://cdn.shopify.com/s/files/1/0433/8761/7436/files/pobejarexewuzekumijiw.pdf
    • https://static.usrfiles.com/ugd/b8c837_55bf3f6d318a4a059be0e1e5e90bd68c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd0a6254a624316afc839a0cfb07ffb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bfa6a90dcf8d4c189bf461da969c0441.pdf
    • https://static.usrfiles.com/ugd/2c608b_799d44b70cc6487995c3643adfda5052.pdf
    • https://static.usrfiles.com/ugd/50c35f_f62b6672c3eb4d8eb4f59879d48232b1.pdf
    • https://static.usrfiles.com/ugd/4f270c_5d3b712a12b347fbbe08eed9b0c62637.pdf
    • https://cdn.shopify.com/s/files/1/0434/3146/1016/files/65967886433.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/aspect_ewfm_user_manual.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_off0000624c.bin
cbc93dc9766d67a7502682f17f9d851b928875ff3ac1601917c4b13ecb896df6
pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 5572 bytes
font_01_sfnt_off00007531.bin
19f1f643a11d7dc8624c8a3eb18f8e68c5dfe83e2a7cf7b12b9a4be75a0d8b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x7531 10480 bytes
font_02_sfnt_off000098f8.bin
47ef58e163604a27beffb3dadc8b461921e634a5051a1e2087107ac07eaa5423
pdf-font-stream PDF embedded font (sfnt) at offset 0x98F8 16120 bytes