Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f1b51d58f41206…

MALICIOUS

PDF

55.8 KB Created: 2020-08-30 11:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbd6a7f4a134e9c698047b93c9e3301 SHA-1: 34a6ce80bf0ddc1c0f13aa5129470549fa5d62a8 SHA-256: 01f1b51d58f41206dc5b36a4ec983ecf981bdb3bec77ac027c04fa16a7b23b50
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to distribute malware or conduct phishing. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to increase visibility of malicious content. The ML classifier strongly indicates maliciousness.

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/wix?keyword=nhdt+w57+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/48181531704.pdf
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/15148551934.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/kamyab_jawan_programme_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/54976096202.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/tanasorutosugakunotozavud.pdf
    • https://static.usrfiles.com/ugd/b8c837_202350c6c4b54632af88f8da9d74f51a.pdf
    • https://static.usrfiles.com/ugd/625844_d8843e9bfcfd4b46bcfab4a4d26fc0cd.pdf
    • https://static.usrfiles.com/ugd/49be48_29f5b2dec2fe4dc6b73c2a21a965cacb.pdf
    • https://static.usrfiles.com/ugd/b8c837_20a9cdbc45ba47989ee0017c62c7f1c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79fbc4fff6349d8a55de628fba08f0e.pdf
    • https://static.usrfiles.com/ugd/87d215_c7955490979d48ada8873fe553a9a085.pdf
    • https://static.usrfiles.com/ugd/e643da_8107ec1d5a59415c96f46a35e8866fee.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/37829840453.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/lananonakoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/craftsman_wood_chipper.pdf
    • https://cdn.shopify.com/s/files/1/0440/5411/8550/files/cricket_3d_java_games.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006718.bin
6ef0acd7d91b3566c195a5f2aec56b77896cdd423522d9adb09babae5d2f8823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6718 17004 bytes
font_01_sfnt_off00009e08.bin
0de3d480ff66f12c19f6346bb00ab2b7999692bed58947a5644a842805b142bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E08 5056 bytes
font_02_sfnt_off0000af3c.bin
1ba4920de8af82d1fc5365b905ee41e6451914bf5ecbcbc0789b1aca1c2914d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF3C 10240 bytes

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