Malicious PDF — malware analysis report

Static analysis result for SHA-256 e485931a57690b28…

MALICIOUS

PDF

42.3 KB Created: 2020-09-13 01:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1444b35f3bceb65d7e3c0d98971439b2 SHA-1: fb8f5158a387a67a7aaa42db496a183392e013d8 SHA-256: e485931a57690b28f51c0e728a9202b09947763b04a87b0c12b6fadc5faa2c0a
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.club/pify?keyword=friends+logo+font+generator, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to fonts and the PDF's creation tool, suggesting a lure to disguise the malicious link. The presence of numerous other links to Shopify and usrfiles.com domains, while labeled benign, contributes to the overall link farm characteristic, indicating a potential SEO poisoning or traffic generation scheme.

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.club/pify?keyword=friends+logo+font+generator
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/57072401507.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/chittagong_board_school_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/bojibumimusuruxepu.pdf
    • https://static.usrfiles.com/ugd/430cb2_c1c26c6a44cc46a5845b548b3e9b39be.pdf
    • https://static.usrfiles.com/ugd/5de1df_6f48f12381954c90b7eb7979aac5cb1a.pdf
    • https://static.usrfiles.com/ugd/54dfea_d12309d7844147a4a0852fa22ce9ef98.pdf
    • https://static.usrfiles.com/ugd/238140_be5eb8043a61489a83bf1a0ddbd386e2.pdf
    • https://static.usrfiles.com/ugd/c0a468_5caad5a4a29a42e6b9e1331cbc4d912c.pdf
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/37445761607.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/meri_bamani_bamani_song.pdf
    • https://cdn.shopify.com/s/files/1/0454/7280/9126/files/wefesop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/1224345356.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0264/files/design_proposal_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/vefudovagabuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0814/7112/files/bisewetimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/6933/9808/files/fryern_junior_school_ofsted_report.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/
    • https://cdn.shopify.com/s/files/1/0434/7294

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006882.bin
e7a7f8cab3e42eb8e8bddc1e1d494e83e73e4f76f08820c68e672afdc79847bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5028 bytes
font_01_sfnt_off000079ac.bin
34d9bb918e238971a178dd214ae9eb1e9dbb6ed3bb943c6f37a133d752ae8494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 10048 bytes

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