Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a6a1cfbdd2f600…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 12:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5791b75c7bc75f59c6e7c04d9afaceb SHA-1: 6898fb4e03879538b5cb4672521646a3d64fde03 SHA-256: 69a6a1cfbdd2f600b2ef041016d1d3d528795af4ff9307d8d07c10ff734cc3d7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to this redirector, suggesting a phishing or scam attempt. The presence of many external links, including to Shopify, indicates a link farm strategy to obscure the malicious destination.

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.ru/pify?keyword=gratitude+journal+template
    • http://xisulori.angelbags.org/uploads/1/3/1/4/131452842/b08d5a94e6045.pdf
    • http://kezeju.hheroez.com/uploads/1/3/1/3/131383791/2828105.pdf
    • http://lagudi.inspirednourishment.ca/uploads/1/3/0/8/130814868/3727019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/zudowalosalanobux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6160/8599/files/apply_for_citizenship_form_n_400.pdf
    • https://cdn.shopify.com/s/files/1/0438/3742/3776/files/revudazupisixusisunaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/5299955559.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/business_intelligence_report_developer_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0447/1911/2345/files/tutorial_arduino_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/69099078323.pdf
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/sarejexumata.pdf
    • https://cdn.shopify.com/s/files/1/0437/3911/9765/files/trial_of_the_sea_lion_alliance.pdf
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/duxipeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/8087556892.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_off000077c4.bin
e77cd0e687e35ce67d5b0c3d01f7150c2c809e6fd7d5fc004d696b68141eef33
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 5032 bytes
font_01_sfnt_off000088d1.bin
044e5790544cd0ed7dd360f80ab36ff93bfc6c49372591f255a43c929913bc33
pdf-font-stream PDF embedded font (sfnt) at offset 0x88D1 10496 bytes