Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a094ec203cd80b…

MALICIOUS

PDF

38.5 KB Created: 2020-08-02 01:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de4e8bd3df7cf1c64ca8172244c44a2e SHA-1: 9bf01f6b1f73b855175ba32b7096763ed69c6f26 SHA-256: 94a094ec203cd80b94c83c3f24d73acfef4ffedc39f475525441317c08d12a1e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=modern+database+management+11th+pdf'. The document body, though heavily obfuscated, appears to contain text related to 'Modern database management 11th pdf', suggesting a lure to download a document. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious redirector links.

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=modern+database+management+11th+pdf
    • http://files.solesistastexas.org/uploads/1/3/0/9/130969525/getapofemik.pdf
    • http://files.tom-widger.com/uploads/1/3/2/6/132682282/f50f5eee7a97.pdf
    • http://files.athleteslab.org/uploads/1/3/1/4/131455283/4e91c04a8bce7ac.pdf
    • https://cdn.shopify.com/s/files/1/0431/6302/5559/files/dnd_5e_phantasmal_force.pdf
    • https://cdn.shopify.com/s/files/1/0429/6117/4684/files/zobebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/97011983857.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/liter_in_gallon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/vodenewipimetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9795/6258/files/dinawabubemudarigevejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/79495155230.pdf
    • https://cdn.shopify.com/s/files/1/0431/2042/7157/files/17303056082.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3799/files/vawesemumemajudon.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/5229369497.pdf
    • https://cdn.shopify.com/s/files/1/0428/6735/9900/files/tafutiginubepitane.pdf
    • https://cdn.shopify.com/s/files/1/0430/7602/6522/files/37599242141.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_off0000574d.bin
23ce1d206c23401b9192719b181a794cec7085c75c8e64369d20b2b0ae82169c
pdf-font-stream PDF embedded font (sfnt) at offset 0x574D 5620 bytes
font_01_sfnt_off00006a49.bin
ca2308c240f0e774d335c61d52c39e5d9e12cdf1f63d45748cbb54bc945ce921
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A49 10320 bytes