Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbfc2d2506e59f5…

MALICIOUS

PDF

43.1 KB Created: 2020-08-08 14:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4e34e3a2da667dcc5869e8738a0423f SHA-1: cd8f674a1395ae710ed7c7cb9a18c8eb35b9c409 SHA-256: ccbfc2d2506e59f5adc19c026590fad00b86b5b061fcf5680f2a58694acf5030
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though obfuscated, contains the malicious URL, suggesting the primary intent is to lure the user to a compromised site. No scripts were extracted from this sample.

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=bland+diet+foods+pdf
    • http://files.onedocs.co.uk/uploads/1/3/0/7/130739839/fasop_waperefanidugos_xojajumu_gixubukakad.pdf
    • http://tifogur.thundercounseling.org/uploads/1/3/0/7/130739415/1140895.pdf
    • http://files.shopwickedwine.com/uploads/1/3/1/8/131857916/2576340.pdf
    • http://majeli.britishamericanpublishing.com/uploads/1/3/1/4/131438641/5619764.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/zazefuduxupopitudopoged.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/fowoxikoniw.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/tecnica_de_asepsia_y_antisepsia_quirurgica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0430/9064/1045/files/26781030156.pdf
    • https://cdn.shopify.com/s/files/1/0437/7359/1701/files/fofib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/importance_and_benefits_of_effective_communication.pdf
    • https://cdn.shopify.com/s/files/1/0433/8964/9050/files/college_bonafide_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/60450965781.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/do_the_barrel_roll.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/dizubipolekesosoruririz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/soluwi.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_off00006cbd.bin
4fd0a5911e8f3a1eb056c975b36d59fc3219b3d1c843a53cf0df29de85ef91f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 4988 bytes
font_01_sfnt_off00007dcf.bin
24766232d8ef47a3e3a3c491f6e13ab29ed80f7bbb760da0020985ec901ea961
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 9992 bytes