Malicious PDF — malware analysis report

Static analysis result for SHA-256 900a1af924715c0e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-08 18:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1919d9edf852e60db1a59278279441ab SHA-1: cc0e109edcb657b40eb4b17c7804fa4da93d8c07 SHA-256: 900a1af924715c0e0262882a77d2955dc1009354ca8be6aa87679d5edbc8af9d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'examples of assumptions in qualitative research pdf' and includes the malicious URL, suggesting a lure to disguise malicious intent. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate this is a link farm designed to redirect users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=examples+of+assumptions+in+qualitative+research+pdf
    • http://votodo.lindapendergrass.com/uploads/1/3/1/4/131453194/67c681f972.pdf
    • http://files.trustandbelievefoundation.com/uploads/1/3/0/8/130874213/lisotikudosopi_wumolopoxexux_mamadaverigifa.pdf
    • http://files.aanenetwork.org/uploads/1/3/0/8/130873995/gemosiboxaxipi_zuleg_lupoxoxu_defekabixomizit.pdf
    • http://files.mikebernalmedia.com/uploads/1/3/1/4/131454158/webusazufofuladamimo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/puniputagowogupifanadulil.pdf
    • https://cdn.shopify.com/s/files/1/0439/7993/1806/files/amor_towles_a_gentleman_in_moscow.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/planos_arquitectonicos_de_una_casa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/osha_200_log.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92313200312.pdf
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/67884662684.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/arduino_micro_schematic.pdf
    • https://cdn.shopify.com/s/files/1/0433/8565/1358/files/jungian_archetypes_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/6003/5735/files/72906475596.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/82601770136.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/duped.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.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_off00006d82.bin
07561d255fd7f0115bbce706e6efa05c020fecdf72ba8e67509cd9154dc493e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 5604 bytes
font_01_sfnt_off0000806d.bin
c3b93636f7581759c5a2ca98a013ef748334af0eeeeda53e4c133472375cc101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806D 10180 bytes

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