Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1e91d8ddeb2c37…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 16:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fba9ef8c1c2cf397c0b46dd2312e2e SHA-1: 262e52e081cf6510b0c3bb32d77c0cacf9b7335f SHA-256: 9e1e91d8ddeb2c37922dbd6283d5ea2d503a5dd98571d8e2ac93fcfa602d9d2f
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware delivery. The document body, though heavily obfuscated, contains text related to an "Infinity tablet review" and the malicious URL, suggesting a lure to entice users to click the link. The presence of numerous other PDF links further indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=infinity+tablet+review
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/xusikisove.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/sovemobexejaxemibu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/f_alphabet_wallpaper_hd.pdf
    • https://static.usrfiles.com/ugd/b8c837_24a6a1ce6bea4e7691dbb652117ab3e4.pdf
    • https://static.usrfiles.com/ugd/834936_1b2c1d9ecb354b1d8e2200517039a4ed.pdf
    • https://static.usrfiles.com/ugd/735189_18e86b71bf664b82b2561ed9cca44502.pdf
    • https://static.usrfiles.com/ugd/7dd30d_1b214ac697464e0b96cac8c6c432b2be.pdf
    • https://static.usrfiles.com/ugd/b8c837_18454bd4b1a940c69a2745f16d8d8ce5.pdf
    • https://static.usrfiles.com/ugd/2813e2_ce241da7dda54f5f9b553d484a0285e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4890071b2bbf4314940612ace5b2b058.pdf
    • https://static.usrfiles.com/ugd/b8c837_24841f9d180540919a1375c8fd60701a.pdf
    • https://static.usrfiles.com/ugd/f4de5e_34f09ba437ee44b1a983a42e30f2bf3b.pdf
    • https://static.usrfiles.com/ugd/49be48_80addb10393e4008a47b30c629f526d9.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_off0000781a.bin
6feaf72765959681c93f339877060ed14ef94d716501de42d95194b1a444066c
pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 4916 bytes
font_01_sfnt_off000088fd.bin
b9b508e1b0063b8f6c22ffd26bf415672ba21802c7085a0f9bbb35fe55ab668f
pdf-font-stream PDF embedded font (sfnt) at offset 0x88FD 10772 bytes