Malicious PDF — malware analysis report

Static analysis result for SHA-256 d287588ab2f17270…

MALICIOUS

PDF

36.9 KB Created: 2020-08-27 21:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e71028cf6f151c523ea6f2ee2116bb SHA-1: 9a4469c62a2ed26b34cadc881b9305fd476d055a SHA-256: d287588ab2f1727007087af310c2246d5e85f0e4ee9a75302ed7b08e77a5143c
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body text, though obfuscated, contains the string 'https://ttraff.cc/pify?keyword=ah+ha+take+on+me+mp3+download', indicating a lure for a fake download that redirects to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=ah+ha+take+on+me+mp3+download
    • http://files.parketvloerenschuren.be/uploads/1/3/0/8/130814397/7653471.pdf
    • http://files.columbushardscapes.com/uploads/1/3/2/7/132712080/9127580.pdf
    • http://zovinu.socalbiblestudy.com/uploads/1/3/0/7/130775634/4811712.pdf
    • http://files.bmcbooks.com/uploads/1/3/0/7/130776008/169758.pdf
    • https://cdn.shopify.com/s/files/1/0430/0292/1123/files/51466063106.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/tazuguvufewapozogakozabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28851780814.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/22409032901.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/destilacion_por_arrastre_de_vapor_de_agua.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/gokugumav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/4950099107.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/pivituxaji.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/autocad_3d_import.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_off000040b6.bin
ca4b138138f128092a46270d897892c8dd39f71b383ff42806103305f0f07b54
pdf-font-stream PDF embedded font (sfnt) at offset 0x40B6 5232 bytes
font_01_sfnt_off0000526c.bin
d33d11f1ed5a13db730c96e22d98b9fca10d498f4f974fa8bef7b6b80606ed0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x526C 9000 bytes
font_02_sfnt_off00006488.bin
1d0380952094ab97c8a49f3d92398e2181374a2d930e2edb5fd22703df3b6866
pdf-font-stream PDF embedded font (sfnt) at offset 0x6488 9496 bytes