Malicious PDF — malware analysis report

Static analysis result for SHA-256 563991d0ea20c1b8…

MALICIOUS

PDF

46.7 KB Created: 2020-08-31 03:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0456133f3ad53a11dee618be2336c30 SHA-1: c9f87f7fab6c7cb80abc0281296b2cc23984b56b SHA-256: 563991d0ea20c1b8bbcba44ebe4a8157a5a794aee257ee87b284c5a07443e4fd
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. This suggests a phishing or scam attempt where users are tricked into clicking the link, leading them to a malicious site.

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=adxl335+library+for+proteus
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/download_kitab_maulid_barzanji.pdf
    • https://cdn.shopify.com/s/files/1/0461/4543/7859/files/buvupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/77814744647.pdf
    • https://static.usrfiles.com/ugd/97634b_3a0e824b913f4aadab3942e4eb28ded7.pdf
    • https://static.usrfiles.com/ugd/822ecd_47df2f420398475aa13752c87633fdc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6158310df2f4a8096c6c1d960caf0ed.pdf
    • https://static.usrfiles.com/ugd/4c1554_913f608e6ae047e99d7f68d00bd6c585.pdf
    • https://static.usrfiles.com/ugd/0adedf_9e4880d7b3ab43528a7ccb2d3052908b.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5026/files/52691899761.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/buxarububozerajijujotu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/52733673846.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/pulajaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/0994/8322/files/mabuwekuvened.pdf
    • https://static.usrfiles.com/ugd/b8c837_8801ef0e5bec44738a311b88c4222d24.pdf
    • https://static.usrfiles.com/ugd/b916f4_a302bf6e73fb4c8b9f71ee3c31df73a8.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_off00007766.bin
0410f0fdf52b8d77e263b33bda4888eb8902e12374a50157cf895a44e2e3f4da
pdf-font-stream PDF embedded font (sfnt) at offset 0x7766 5624 bytes
font_01_sfnt_off00008a9c.bin
013aea4547dff2b93bf911fc953e2117948aec8ef6317a87f663b64efd959d2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9C 10496 bytes