Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec0a3cba22555a6…

MALICIOUS

PDF

72.2 KB Created: 2020-08-25 03:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a8ab88fa5a7d8ca1708defefd7f4527 SHA-1: 963a0f030151185cf91af9d3e689fb5dbdd3a06e SHA-256: cec0a3cba22555a6def08de423d6988585e7f1c787d4ec0727bca623d67cee37
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=character+certificate+application+form+pdf', which is likely used to redirect users to further malicious content. The document body, though obfuscated, contains text related to a 'character certificate application form', suggesting a social engineering lure.

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=character+certificate+application+form+pdf
    • http://files.maltafpd.com/uploads/1/3/1/3/131383424/kuzatoroxe-dozibotiresuf-jikoxilazegi.pdf
    • http://webamelo.jvanimator.com/uploads/1/3/0/8/130874431/rawunab.pdf
    • http://poxutiwo.pristinedetailingindy.com/uploads/1/3/1/4/131408027/dbb4c3ec1e92d1.pdf
    • http://pajut.goreybypass.com/uploads/1/3/2/3/132302870/316717.pdf
    • http://fedegovik.fluxplay.co.uk/uploads/1/3/1/6/131606490/watufujinewojabul.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/ethical_hacking_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/animation_creation_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/1420/9186/files/1955749766.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/free_it_ebooks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/67781935310.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/38407414821.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66689816557.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/bezux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/84196719626.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4741/files/figubidipixutajevimaka.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/linoxemawoxofogibokazaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/fovebuxixevarebu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/56251544688.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_off0000d4d7.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D7 2828 bytes
font_01_sfnt_off0000ded1.bin
71ba40db6abb2645805631533f8feae0af70451581668d1f54dddc99f63a2255		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5124 bytes
font_02_sfnt_off0000f00c.bin
0b068b422a0ae22a677fbaaa2ea3a010b9ac5c11b0d96d718c388cb694dada5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 10288 bytes

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