Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71d217afa7d7dba…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 21:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee0f945b835166d5ea29ac77e75a0453 SHA-1: f53f4a61a50ad7441cb672213fe5c29303a8d307 SHA-256: b71d217afa7d7dba907e3a0aa58e4dbc98d9141933dede7aa77574b534a57ea6
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.com/pify?keyword=manually+remove+additional+domain+controller+2008+r2', points to a known malicious redirector. The document body contains garbled text but also includes the same URL, suggesting it is the primary lure. The presence of numerous links, many hosted on cdn.shopify.com, indicates a link farm designed to distribute malicious content.

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/pify?keyword=manually+remove+additional+domain+controller+2008+r2
    • http://files.hswestmi.org/uploads/1/3/1/4/131436981/xabuna.pdf
    • http://files.shapiropage.com/uploads/1/3/2/6/132695805/dozasavix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/mepal.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/bibagugox.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/33122243561.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/viwopinotomoxegerajanin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/bemowaraxovapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/sennheiser_tr_120_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/81685389040.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/35358162611.pdf
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/gewagugijafovugofe.pdf
    • https://cdn.shopify.com/s/files/1/0439/7645/8398/files/lugiwev.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/simplification_and_approximation_questions_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1735/files/wevuzawagezegonejujud.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_off000061d0.bin
4c9b5626db7e97e540a07bf205325458af56d9be47a876b39e8e038a1f4c12a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 5540 bytes
font_01_sfnt_off000074a1.bin
adffdfec3b9ce669530f5524cac6e040fd7bd3bd3956ab54798fb0f854a4e24f
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 10144 bytes