Malicious PDF — malware analysis report

Static analysis result for SHA-256 01aac996b986ef27…

MALICIOUS

PDF

35.3 KB Created: 2020-09-01 00:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70476e3ea1265953d5f408bcfe573806 SHA-1: cd4dda4d8a528b07b21718a99413668ed35a7dba SHA-256: 01aac996b986ef27f2362fc72839ba4b185d16753b81a8f2c6d88d2f2feb9750
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript

The PDF was flagged as malicious due to a high number of embedded links, many of which point to a redirector. The document body contains a URL that appears to be part of a link farm, likely for SEO manipulation or to distribute malware. No scripts were extracted, but the presence of numerous links suggests a redirection or content-luring attack pattern.

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=big+little+farmer+apkmonk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/newcomb_s_wildflower_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/1768/9498/files/brown_marmorated_stink_bug_information.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/51687419407.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/kenividowowezexivefelepek.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1030/files/minecraft_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/98265250440.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/1864954866.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/nanuvetuloxe.pdf
    • https://static.usrfiles.com/ugd/fd3290_50e6d70c8f794ab3a1b01e52b975a334.pdf
    • https://static.usrfiles.com/ugd/7dd30d_dffd77a7002743c8a26649f007fb5458.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c277f22ac2468082653bf955e79bc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_cafbaa95d8724e1cbb564a3883c79c92.pdf
    • https://static.usrfiles.com/ugd/e78b77_2d64bca1f1b54921bbd1f9d033ff28e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_531bfd49a313432182eb865a40269856.pdf
    • https://static.usrfiles.com/ugd/4c1554_23fd9a469d3e45619b2a333de5e7fca1.pdf
    • https://static.usrfiles.com/ugd/451461_019aa96cdee543d6bb85d495887dd471.pdf
    • https://static.usrfiles.com/ugd/724bd4_f35f7319cf9a4ecfb690b46ba739a4a9.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_off00004d53.bin
e33f5009335132174c3ba5eac3e1ce32a4bb35e7871275efcb0122dc9fabe45a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D53 5156 bytes
font_01_sfnt_off00005ed5.bin
4301c269be510272bb826d46e895fe055f9cd83d8d503d96ee5b45a8e89855ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 9936 bytes

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