Malicious PDF — malware analysis report

Static analysis result for SHA-256 8958e45dd644208a…

MALICIOUS

PDF

42.9 KB Created: 2020-09-03 09:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05152b3f4771cf9923badfcccc39489f SHA-1: 5734f4f40656631dfcceb67713ef496c67cc240c SHA-256: 8958e45dd644208af05b822bbbc5e1e58a4a63477af41bbe4999f3416162d086
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that suggests a lure related to a 'Blockers 2018 parents guide'. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a further stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/wix?keyword=blockers+2018+parents+guide
    • https://static.usrfiles.com/ugd/dfb5f8_a8b3e37af4004b3ca2413813fd07bd6d.pdf
    • https://static.usrfiles.com/ugd/2f3216_4662ff3779b745d8b7d262701e8279ac.pdf
    • https://static.usrfiles.com/ugd/d54300_1db2c8bc86654a92a2d6580014bb7bfb.pdf
    • https://static.usrfiles.com/ugd/3283b0_4f4207cfc14e4b93bf8aee182247b3cd.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_8beef3f51ae2411cbb44d68e2b3b5000.pdf
    • https://static.usrfiles.com/ugd/26938b_c9cc558cc2aa49b0b365a6f7d24b76f4.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/fitted_double_bed_sheet_tesco.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/12841910028.pdf
    • https://static.usrfiles.com/ugd/d63aaf_fee3f90fc3d64ea680511499b790a5d8.pdf
    • https://static.usrfiles.com/ugd/dad90e_f49cf0baf45e4ef085cb0bed8c5cb856.pdf
    • https://static.usrfiles.com/ugd/99a8f2_74f85a4224164a5d8d40f1cbfd772bc6.pdf
    • https://static.usrfiles.com/ugd/f8de3e_e686644b62e84bc0a5135decace44235.pdf
    • https://static.usrfiles.com/ugd/c33f71_cf10abc2e2b14faeafaa4a48be084990.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_off000067db.bin
1642bc2a14a57e93fde01520673c13f02e3689d4bbf8f8ceaf931a9685e57813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 5872 bytes
font_01_sfnt_off00007bf2.bin
35e35b2897a26f6e2811e454ef7a3bb1821ee8807540d8fe40c709cbc5783f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF2 10212 bytes

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