Malicious PDF — malware analysis report

Static analysis result for SHA-256 803b529a163c3d92…

MALICIOUS

PDF

36.5 KB Created: 2020-08-31 14:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e310e7a29ca634c109bbac96d31bbea2 SHA-1: 702d193d0561f72a3553f04e84860d24b50a15e5 SHA-256: 803b529a163c3d928f71a740f3ea25489e05ec282ca1757e0c26f76e966b4296
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document's primary purpose appears to be SEO manipulation and user redirection to potentially malicious content. No scripts were extracted, but the presence of a malicious redirector and the sheer volume of links suggest an attempt to drive traffic to a malicious site, likely for phishing or malware distribution.

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=new+assamese+song+2018++hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/zulurazajobaro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/21584895842.pdf
    • https://cdn.shopify.com/s/files/1/0437/7870/3511/files/kugofofizisogupijivum.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/character_sheet_5e_dnd.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/8236937693.pdf
    • https://cdn.shopify.com/s/files/1/0436/5398/8510/files/html_css_template_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/27200448035.pdf
    • https://cdn.shopify.com/s/files/1/0440/8541/1990/files/81874617780.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_681ddea083d64e189215df4e580839d8.pdf
    • https://static.usrfiles.com/ugd/696117_9b6b80f381dd49c19a79586d8190101a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3717f03d7bd4464691cb01ea4669825d.pdf
    • https://static.usrfiles.com/ugd/b8c837_df6601f92c884f0786c7ba4c1e132fd1.pdf
    • https://static.usrfiles.com/ugd/dad90e_12d6f925789c4ed383fd6a2e724b0cc5.pdf
    • https://static.usrfiles.com/ugd/f80014_a3438215a0634a61ae1a6b2a53939e28.pdf
    • https://static.usrfiles.com/ugd/dad90e_0882165a21924919ae65e245c86fa6b5.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_off00004441.bin
34160a851161349a54e735d83ffeaef2d90dc6b5c90a914ae9fece59250a3f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4441 5352 bytes
font_01_sfnt_off0000564f.bin
8ba265ec4f1ad64722167f82eb979ff8864bf1f62b4f0cd766d9907e4e41fd24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564F 9624 bytes
font_02_sfnt_off00007736.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7736 4324 bytes

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