Malicious PDF — malware analysis report

Static analysis result for SHA-256 f934ec0ed9e0b04c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-30 06:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 086e00cc152b8c1b0d8946064a947c46 SHA-1: efbd3df76488937209c88fae16e56f12b9bd67ec SHA-256: f934ec0ed9e0b04c324eb96600d39658023dc6bd1b713f7beee9c683e5595125
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as song lyrics to entice clicks. The ML classifier strongly flagged this PDF as malicious. The document body also contains numerous embedded URLs, including a link to a Shopify domain, which is likely part of a link farm to improve SEO for malicious content. 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.com/wix?keyword=ye+dil+tumhare+pyar+ka+mara+hai+dosto+lyrics
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/boundaries_in_marriage_download.pdf
    • https://cdn.shopify.com/s/files/1/0460/0935/2359/files/xomovegurosojujebozanesep.pdf
    • https://cdn.shopify.com/s/files/1/0428/2505/6412/files/angular_2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/73413827272.pdf
    • https://static.usrfiles.com/ugd/0d9a50_5c3005f24d5e44849e5255b452912a3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_841a276aa1df44f2a5fb74083887c82a.pdf
    • https://static.usrfiles.com/ugd/3e87bf_bcdf1fa384d64684b1292697a1c690d3.pdf
    • https://cdn.shopify.com/s/files/1/0434/4840/2081/files/placenta_accreta_index.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/dinapokakarolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/gemikilanodenudimevele.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/tagokupalo.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_off0000529c.bin
097390f13cd5a500f872af51d6b3a94110a6bfee8166236637d60d7049731425
pdf-font-stream PDF embedded font (sfnt) at offset 0x529C 5440 bytes
font_01_sfnt_off000064f8.bin
928240da6eb965edfb2379d3c777d1980b391b01c0627d65b4b90658e0e30d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 14596 bytes
font_02_sfnt_off000092c9.bin
0e0ca51050ccdf0d6b7589f86999942ebe3de99dc0185b55c3dfd8ce866ccf4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x92C9 4828 bytes