Malicious PDF — malware analysis report

Static analysis result for SHA-256 7438c1776f4d6c78…

MALICIOUS

PDF

48.0 KB Created: 2020-08-15 06:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 500a81b5aa800caedfcafd8f83a54bd1 SHA-1: 7c4b092f04e38f15ad3b62e3d898d57fea557e5d SHA-256: 7438c1776f4d6c78a2485f502ccb38628431dbc7ad575950ec797aad2d1f69ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.com/pify?keyword=measurement+and+significant+figures+report+sheet+answers, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains references to this URL and other PDFs hosted on Shopify, suggesting an attempt to lure users with seemingly legitimate 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.com/pify?keyword=measurement+and+significant+figures+report+sheet+answers
    • http://pobukizas.leeengineeringinc.com/uploads/1/3/2/7/132740541/6649653.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/81175434915.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/dofenowotawatubalesapem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/86512566452.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/89418131157.pdf
    • https://cdn.shopify.com/s/files/1/0437/5884/6109/files/7290600986.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/79304811535.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/netepokixetoxafakojok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/75540756173.pdf
    • https://cdn.shopify.com/s/files/1/0436/0192/0157/files/62669803735.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_off00006f2e.bin
81ff094dd56e365c2859fd80f5c83ab2e5666cc407b966c3a3ceff1063013e51
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 5516 bytes
font_01_sfnt_off000081d1.bin
0b202ad302f78f43667d7035c6754fac00e965376c96481d45310f7b3eea3f66
pdf-font-stream PDF embedded font (sfnt) at offset 0x81D1 10276 bytes
font_02_sfnt_off0000a4f2.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F2 4324 bytes