Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96b893b9bec8774…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 18:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa9a02e4bcf018e977ceca2d1e78ff0d SHA-1: 8f4cba2a2735c763ac9d59787d85bef05feb6661 SHA-256: e96b893b9bec87747bfd426eab66c9776bb4cdc8dcad6474b49b2510fab40304
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=apollo+munich+form+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a link farm further supports a malicious distribution or redirection scheme.

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=apollo+munich+form+pdf
    • http://wuzim.evictory108.com/uploads/1/3/1/0/131069839/02b68f.pdf
    • http://files.kerrycaffynart.com/uploads/1/3/1/0/131070866/velolam-xubexezibeva-zewis-nobek.pdf
    • http://files.linebaptist.com/uploads/1/3/1/4/131437873/4d68aae293d.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/lomemosilozinamokojugiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1558/files/zojokoludixos.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/fazaxoluzojol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4814/files/barebezumorawariti.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/63064115314.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/79211963887.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/95754221113.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/tipulezix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/1062027644.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/949986333.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/vexogiwetitakavot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/pesipisokolaligebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1059/files/42140047114.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d26.bin
1fc0063f92002443bd2bb7ac93e8bd01b7a2d2281ff91125131527ec83b53d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D26 4680 bytes
font_01_sfnt_off00005cc3.bin
ef80e3643c4cb39317c2cc49fef813b046c76e33fbd7528135367ca39e0a80c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC3 9888 bytes
font_02_sfnt_off00007eb3.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB3 16164 bytes
font_03_sfnt_off000093cc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93CC 4324 bytes

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