Malicious PDF — malware analysis report

Static analysis result for SHA-256 14408c07c4acb3a3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 02:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 407ab6155a76d4c5c65727d8096914d9 SHA-1: 63edcd415cec45b7e3178f1bb51f7f82efb24c56 SHA-256: 14408c07c4acb3a3095ce4387969111f474f290b193e93f2314049a186b99e93
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also features a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While the primary link leads to a malicious redirector, the majority of other embedded links are to benign Shopify URLs.

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=askep+tetanus+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/oreshura_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/dalujapenerudawubetaluda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/relaxation_breathing_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/how_to_assemble_baby_einstein_jumper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/atrocity_act_1989_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3874/3450/files/play_store_me_pending_problem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7684/5728/files/72569386576.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5b935660bb4b41b0a56ed5f44f4834f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3ff21_318582fdcf79452fbe64d307032c7ee6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2274a7_5c16724ebfa74fcc8b891219041850d8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/canada_work_permit_approval_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7301/1863/files/attributes_of_god_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2652/files/57009797291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/54638225060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2739/0615/files/81015650826.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a14.bin
da3796f914888a31160a66ebe479c7f794ada72d0180d740094fa0f550eeaeaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A14 4960 bytes
font_01_sfnt_off00007b0b.bin
a2f6c7fe0f86866d6d83165abaa675c4043d3d92ed1ac939f3cd941563ae4f0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0B 9948 bytes

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