Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a57e7ed021021ae…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 18:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb26ed68fd1fc7de0b13f7e1d7138d7f SHA-1: 7d51338a633bb343a616243a6e822dde57c18916 SHA-256: 4a57e7ed021021ae3de12b5a2494f32e5001708fd5986d215c826191881661ea
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a lure related to blockchain technology, but the primary malicious activity is driven by embedded links. One critical heuristic indicates a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=blockchain+technology+pdf+download'. Additionally, the PDF hosts a large number of SEO-optimized links on Shopify domains, which is flagged as a link farm. These techniques suggest the document is designed to redirect users to malicious sites or manipulate search engine results, rather than deliver 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.cc/pify?keyword=blockchain+technology+pdf+download
    • http://kumediz.momentumsportpsych.com/uploads/1/3/1/3/131398020/7531731.pdf
    • http://bigogem.davidyardguitar.com/uploads/1/3/0/8/130874633/zukotazeje.pdf
    • http://files.pnexams.com/uploads/1/3/0/8/130814466/1377634.pdf
    • http://files.ldsjapanmission.com/uploads/1/3/1/3/131380895/5dc9a09.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/rudimiziw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/rikupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/zepito.pdf
    • https://cdn.shopify.com/s/files/1/0446/8791/7209/files/accounts_payable_interview_questions_and_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/57601827307.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/1823199219.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/43328518152.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/sims_4_malcolm_landgraab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/sabidubakiwupitopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/44034610799.pdf
    • https://cdn.shopify.com/s/files/1/0433/3099/4326/files/1207941904.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0319/files/vabisawewukireletuviwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5171/2666/files/naduwipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.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_off00006bee.bin
f44e9a91c35234c74aca97e84fb633787449245e72e06961a693d3281f3e534d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEE 5448 bytes
font_01_sfnt_off00007e9d.bin
3eb2d1803e4346de509c0d025adb099334c6d7a27494c8b50ed97452434ddddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9D 10164 bytes

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