Malicious PDF — malware analysis report

Static analysis result for SHA-256 fece2f1136531894…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 05:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce76dcefedd8d1f7e9895db1b55ad83b SHA-1: 288309fc6b41f71872e6dba4edacf1285a2b476e SHA-256: fece2f1136531894d8dbf24e68f77452eb09cdd965110ab17bca6a239c98ad4b
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL, https://ttraff.cc/pify?keyword=rena+filstar+xp+3, is likely used to redirect users to a phishing or malware distribution site. The embedded document body text, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous links hosted on Shopify and other domains suggests an attempt to obscure the final malicious destination.

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.cc/pify?keyword=rena+filstar+xp+3
    • http://files.mjlpa.us/uploads/1/3/1/3/131380626/jukaw_rixof.pdf
    • http://files.agallisresidence.com/uploads/1/3/0/9/130969003/pipapidod.pdf
    • http://files.spartanleadershipgroup.com/uploads/1/3/1/3/131379899/47c1cb.pdf
    • http://files.nhsoulstudies.com/uploads/1/3/0/7/130775393/26ef92e5.pdf
    • http://files.lilsproutpress.com/uploads/1/3/1/4/131407284/a4e38202f106c97.pdf
    • https://cdn.shopify.com/s/files/1/0434/0046/2501/files/digotozevewujuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/40296313748.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/tigebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/41808624697.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/wujezidoripo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/volukeru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/91061451491.pdf
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/jeep_wrangler_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/veresunepo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/pokemon_tower_defence_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/rukinexivimukolipej.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_off00006d38.bin
a4cc6dbaa55f02d4e18f1ec9190ac6b9b95d9dbaf2442ec2f189ff0a6afa4346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 5136 bytes
font_01_sfnt_off00007ed6.bin
d3ed8df4da627cd50f86eee6d8db858a11a7495d9baf110e8b6d52d0d2468669		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED6 10544 bytes

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