Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3d329038d21398…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 03:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd520f0955c7db8752ebe29e3e2c873e SHA-1: 569dc9b467cb1e6c0ccad03c9cf27d23b8acefab SHA-256: ad3d329038d213980a557ae1b9f4f3c6a6f2aaf1fdf92a37982e54e44bb35c2c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=analise+de+dados+python+pdf'. The document body, though heavily obfuscated, contains this URL and others hosted on Shopify, suggesting a lure to disguise the malicious redirection. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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.ru/pify?keyword=analise+de+dados+python+pdf
    • http://wenojo.wagsoflove.com/uploads/1/3/0/7/130775432/wotawu.pdf
    • http://files.staciavhunterministries.org/uploads/1/3/0/7/130738875/4a6270602b6cc5.pdf
    • http://perofozam.freecryptoinfo.com/uploads/1/3/1/4/131453645/nuvirixobiv.pdf
    • http://majad.buckleberryfarm.com/uploads/1/3/2/7/132710621/8650309.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/14572065938.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/area_of_complex_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/canada_work_permit_application_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/alimentos_para_diabetes_tipo_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/52470250353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19941062624.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/ethiopian_grade_12_biology_text_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/15344611694.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/jekurujamazodorafudepefim.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/93457700967.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/fuzuwudaki.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_off00005d4c.bin
114f89fc49e7f534c8e4617fcca6723a20a5e2ead26f926847c3f47ccff2bd4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4C 5124 bytes
font_01_sfnt_off00006ec3.bin
3ccfd9c4933aaffc35ad6ddb9cc3c50068e43f0e581a09e60220c427cbf1f834
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC3 9980 bytes