Malicious PDF — malware analysis report

Static analysis result for SHA-256 af13be6c83ae6ff0…

MALICIOUS

PDF

51.7 KB Created: 2020-08-16 20:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc397f1ea8e33591c0af13585eb6e1b SHA-1: 57202193fe086f34c679d000b719e3a727f5d22e SHA-256: af13be6c83ae6ff05b9bc7e74635167198e14d76fe31a1e58b2c93a241d957f1
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=email+html+template+github', which is likely used to redirect users to a malicious site. The document body contains garbled text but also repeats the malicious URL and several benign-looking Shopify URLs, suggesting an attempt to disguise the malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=email+html+template+github
    • http://dulaj.dammaimorganllc.com/uploads/1/3/1/6/131636817/nogafizuwagifa.pdf
    • http://files.gardensatunityvillage.org/uploads/1/3/2/7/132740700/3990801.pdf
    • http://files.realestatebaguio.com/uploads/1/3/1/8/131856352/1b4fbae590ba4.pdf
    • http://files.stevemillerworldview.com/uploads/1/3/0/7/130739062/6025175.pdf
    • http://files.ciscotxpiefest.com/uploads/1/3/1/4/131406804/rameles.pdf
    • https://cdn.shopify.com/s/files/1/0433/3787/5614/files/cisco_ccnp_switch.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/74795713705.pdf
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/doredalumebot.pdf
    • https://cdn.shopify.com/s/files/1/0438/5135/0166/files/pulmonary_arteriovenous_malformation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/jejilifugugobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/bread_making_process_in_bakery.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/23317076347.pdf
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/promissory_note_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/38293004749.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gidawibozifuniji.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c47.bin
f1933af25e177aeeb03dd0d7b1d669fd3d2cc431157cc4c381b975853b83acc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 5056 bytes
font_01_sfnt_off00007d47.bin
e9a3f4b98c42be50dd3ed2e5b62218c2ce6ef848695ded22b6e93f5631e0c5bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D47 2808 bytes
font_02_sfnt_off0000892f.bin
701f187c7fd2d42c3bd472edef15024477c16a47d1ce5dcd77dab9bad095c1de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 10128 bytes
font_03_sfnt_off0000ac13.bin
3dae81b76154e7c62b3b0d30507344c78f02ee9172d09a03fe7a9af96af9e849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC13 16116 bytes

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