Malicious PDF — malware analysis report

Static analysis result for SHA-256 7510db85e2b060e5…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 06:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c12cca0eeaf8dd99300b8e7b699fdc2 SHA-1: 11759ba966f7cb492e547db3f0b5d5ab34feb2d6 SHA-256: 7510db85e2b060e566b04cb78a39597ea4c553a9f1bee2e75776e70d23647f5c
162 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to benign Shopify URLs, but also includes a critical link to a known malicious redirector at ttraff.com. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect the user to harmful content. No scripts were extracted, but the document's structure and embedded links suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=metformina+hcl+1000+mg+para+que+sirve
    • http://files.suzannewales.com/uploads/1/3/0/7/130776309/8928865.pdf
    • http://xewijon.societeaus.com/uploads/1/3/0/7/130774993/023c2.pdf
    • http://gigewoki.gracefulrosaries.com/uploads/1/3/2/6/132696212/mazolusinulesaf-bikenejege-pigisajekeko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5290/0260/files/rashtriya_khadya_suraksha_adhiniyam_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/army_cyber_awareness_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6298/files/zelaxusafomijoloxugesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/97539380558.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/can_you_read_books_on_kindle.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/50051087639.pdf
    • https://cdn.shopify.com/s/files/1/0428/5169/6796/files/button_cutting_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/sokevufejapogibupazodimo.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/analogy_test_for_civil_service.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/nowinadifiterorepinenodaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/47109433742.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000625a.bin
5389705f19cd1210bc49221508a09cd586e92bdf1eae55079d3faac562e29836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625A 5816 bytes
font_01_sfnt_off0000760a.bin
c32ab0e054406a0f9d7f74b6ceb8d39e4635ff9c5fa904a0c438ce3ab4731b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 11664 bytes

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