Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40c9bce6dbcb046…

MALICIOUS

PDF

50.1 KB Created: 2020-08-10 18:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33269e24559d23ef0d93392c18507cc0 SHA-1: 17a7b2f3194e41bf5471ca196193cdd95baa90d3 SHA-256: e40c9bce6dbcb0461b1b9c9d23f5dbc8e8f668bae777b805a7ad6da320a31f40
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.com/pify?keyword=workout+calendar+template+pdf, which likely serves as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to distribute the 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=workout+calendar+template+pdf
    • http://files.algonacwrestling.org/uploads/1/3/1/4/131483336/1613903.pdf
    • http://files.electroyelizondo.com/uploads/1/3/1/4/131406453/aa384e4c25d0dd3.pdf
    • http://files.mandiware.com/uploads/1/3/1/4/131453450/raboxokipafagizaneg.pdf
    • http://files.arcrestour.com/uploads/1/3/0/7/130775831/f0c9521e4.pdf
    • http://files.ebenezerconyers.com/uploads/1/3/1/4/131408537/5101117.pdf
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/pufotubarifojusum.pdf
    • https://cdn.shopify.com/s/files/1/0448/4261/4945/files/the_adventures_of_tom_sawyer_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0441/1890/0888/files/bidding_process_for_construction_projects.pdf
    • https://cdn.shopify.com/s/files/1/0438/2362/8450/files/padisivifegozesoruvusoxop.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/nivonosazasupaditiwevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/centurylink_router_login.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/fibiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/bomojewufunasovesamiwib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/29826546809.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/a_taste_of_romance_full_movie_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/87046331393.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/nobesa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/zibuxukasigi.pdf
    • https://cdn.shopify.com/s/files/1/0452/8907/8946/files/nusejodoxirapumin.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_off00007950.bin
b0e105c2ccd57174a312bbfba6a7401d205b86c627efbc99f46fbc971640a86d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 5032 bytes
font_01_sfnt_off00008a68.bin
cc495b149eb68a84ef29b33e55b690b1512017068969ae8e34bc8df9e72bbae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 10188 bytes
font_02_sfnt_off0000ad3e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3E 4324 bytes

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