Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff611919ab726c3b…

MALICIOUS

PDF

65.3 KB Created: 2020-09-01 10:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fba8f836d8ccdf6060f83138e1777788 SHA-1: 19afce07667cee83626baee30c40fb92a2402885 SHA-256: ff611919ab726c3b3943e3361f07ee3360f58d2f160d3687bec8da0d2924e4be
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=tamil+movies+2016' is likely the primary mechanism for delivering a malicious payload or directing users to a phishing site. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent.

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=tamil+movies+2016
    • https://static.usrfiles.com/ugd/b8c837_a4ad87bbb5ac45b1b7a6d1efa8027d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b4078be1ad94920a9a9c9a07c1541c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f309e07050e64ca5be621a630ff9834f.pdf
    • https://static.usrfiles.com/ugd/225520_02376d8d336a448bbffbfb291b821242.pdf
    • https://static.usrfiles.com/ugd/c33cdb_e83ba9fbaf1448478d24bb001231b08c.pdf
    • https://cdn.shopify.com/s/files/1/0434/6137/8212/files/iters_3_tip_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/cirrose_heptica_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/vurebisafusase.pdf
    • https://cdn.shopify.com/s/files/1/0465/0159/3246/files/gumigidesazipinosuludol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/23607910077.pdf
    • https://cdn.shopify.com/s/files/1/0431/0502/6199/files/note_block_song_maker.pdf
    • https://cdn.shopify.com/s/files/1/0434/0419/8044/files/mejipuk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad19.bin
f4a8c066064387059b75b6e653c4ca95c57caaa848b633e6947b2e166f54b6d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD19 5224 bytes
font_01_sfnt_off0000bed9.bin
8c86547c0a8627f2eb33f81ed2f85b59a2887f3bca6b3dc4f5235564d323effc
pdf-font-stream PDF embedded font (sfnt) at offset 0xBED9 10740 bytes
font_02_sfnt_off0000e342.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349
pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 16164 bytes