Malicious PDF — malware analysis report

Static analysis result for SHA-256 223616c9dac5fc9d…

MALICIOUS

PDF

59.6 KB Created: 2020-08-16 19:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7f5037d504d553e1d79c465cd77d2b2 SHA-1: 20c87170a1a6eaf935630ba6ce4075d3cb5aa320 SHA-256: 223616c9dac5fc9d93b431ec876d0bab0b9e6660ebf26cb35fe69f542458bedf
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to lure the user to a malicious site, likely for further exploitation or credential harvesting.

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=animal+cell+organelles+and+structures+worksheet+answers
    • http://susamijot.borntocreate.store/uploads/1/3/1/6/131606739/1dd99299cba857.pdf
    • http://files.debbiepowersauthor.com/uploads/1/3/1/4/131437446/535a815243f.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/lista_de_alimentos_con_fibra_soluble_e_insoluble.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/12225840676.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/legoba.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/caregiver_burnout_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/busizeporejaredazuxufodeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/discord_font_generator.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/math_worksheets_on_slope_and_y_intercept.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7903/files/79455378925.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/animer_une_session_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0437/5743/7080/files/53916646926.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/1/0434/8923/1000/files/legoba

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ab1.bin
e5bf076d2bd84b972e761928793267cf77eda41b61b1b8e116a7d0189b810e08
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AB1 5380 bytes
font_01_sfnt_off0000accb.bin
8118af02d861c1a1d477a1d9a3040ff54e5e7d90d5236bb896d367315f35e467
pdf-font-stream PDF embedded font (sfnt) at offset 0xACCB 11536 bytes
font_02_sfnt_off0000d2e0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 4324 bytes