Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc39011981b62f5a…

MALICIOUS

PDF

46.7 KB Created: 2020-08-23 06:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbc7c4dc40c3406261480438df60d625 SHA-1: 786ae5539e87f94a3cb277e1cb8a7a5dc535099f SHA-256: cc39011981b62f5ace3de369fce2175493189ef4e1bb963f5761854efc5e2bae
152 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its extensive use of embedded links, many of which lead to a redirector service. The document body contains text related to 'car games for free no', suggesting a lure to entice users to click the malicious links. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves redirecting users through a link farm to potentially malicious sites.

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=car+games+for+free+no
    • http://files.scharencycles.com/uploads/1/3/0/7/130776118/ginukaxezunat.pdf
    • http://gunavux.jenroweaicp.com/uploads/1/3/2/7/132741100/bapimoj-didivopefum-sapiduraju-wiwejakidexof.pdf
    • http://rebikasez.baieslings.com/uploads/1/3/2/3/132302842/a6a58cc.pdf
    • http://files.roseempiredance.com/uploads/1/3/1/6/131606069/mosegavupebido.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/discord_roleplay_server.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/zivotewajube.pdf
    • https://cdn.shopify.com/s/files/1/0431/4044/8410/files/palabras_basicas_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/logiwobarar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/2599425977.pdf
    • https://cdn.shopify.com/s/files/1/0430/7694/4021/files/evertale_guide_training_dojo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/49023471848.pdf
    • https://cdn.shopify.com/s/files/1/0429/3358/4035/files/serious_anime_girl.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/zuwixogomifiloduto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/vekebokino.pdf
    • https://cdn.shopify.com/s/files/1/0430/7828/7513/files/wevuxexo.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
stream_004_off0000722a.bin
955d36ac4127059cd83cf1392aa8eb9f2df918a677397ccc17f41e17162cd8d0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x722A 8652 bytes
font_00_sfnt_off0000615f.bin
f5540812120529a0f3d49b6361fe74f19b2337da5ca4a8608fe230a0f1fa96fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 4960 bytes
font_02_sfnt_off00008b5c.bin
d684bae2bbecbb737fd13fb7d7b6e44f2584f6e85071a3784acc1d5f89ce25ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5C 10076 bytes

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