Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b04406d6bc6c509…

MALICIOUS

PDF

92.6 KB Created: 2020-07-30 22:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea9a255717dfc194de53f51339b76221 SHA-1: 07a7c047ecda771c83ad6213aabb3f6ca7eff646 SHA-256: 9b04406d6bc6c50925163aa3a125a22be43ca3e38efa47313157ef7750e01acf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to Shopify-hosted PDFs, suggesting a broad distribution effort. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Aripiprazole davis drug guide pdf', which serves as a lure.

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.com/pify?keyword=aripiprazole+davis+drug+guide+pdf
    • http://files.toucandesignstl.com/uploads/1/3/1/4/131453395/pepurupivez.pdf
    • http://files.phimi.pt/uploads/1/3/1/8/131871569/jojikupikavamef.pdf
    • http://files.abbystewartmusic.com/uploads/1/3/1/8/131871786/9203347.pdf
    • https://cdn.shopify.com/s/files/1/0429/9259/9193/files/97552537257.pdf
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/fagotibevorokitubutojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1945/files/zanisanowugugaxaziv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/solegirobaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/54500295986.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/8896640362.pdf
    • https://cdn.shopify.com/s/files/1/0433/1349/6222/files/19547250286.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/lakigasubagozir.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/xetuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/73310433424.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/99649976342.pdf
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/sikibureg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6899/7284/files/88149135152.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_off00010760.bin
46cb87bed6c21d8e10abdce117efbb9570ad39447396f470778884d470f43061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10760 5004 bytes
font_01_sfnt_off0001187d.bin
0171115b41b3100600861af92c7306fa4cea6e67a1e4513c9de233d9098eeb14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 16292 bytes
font_02_sfnt_off00014cd4.bin
f80b9f84d6ea16074f67da7a904ab41e14e5a44612b81a97f195d72f9bd2a496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD4 16160 bytes

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