Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0897d719ced31d…

MALICIOUS

PDF

51.7 KB Created: 2020-08-06 23:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1521283f1ef0c12cd5a8893d40a8b0f7 SHA-1: 8eb08f26a5880aa9241b0d59ebbd96193cbc894a SHA-256: 0e0897d719ced31de86d9183a693124581422005fadfc52bc143609b9d4335c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one critical heuristic identifying it as a malicious redirector. The document body text, though partially corrupted, includes the phrase 'Cdpo question paper 2020 pdf download' and a URL that aligns with this lure. The presence of many external PDF links suggests a link farm or SEO manipulation tactic 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.cc/pify?keyword=cdpo+question+paper+2020+pdf+download
    • http://files.duralumsiding.com/uploads/1/3/1/4/131482823/5689804.pdf
    • http://files.sangha-dancemovementyoga.org/uploads/1/3/1/6/131606343/xowajuzetulit.pdf
    • http://jafukila.minimiel.com/uploads/1/3/0/7/130776760/404024df6bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/lolelajovafipoxesaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42228357160.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/24467192533.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/34737495289.pdf
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/duzeze.pdf
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/asma_ul_husna_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1656/0550/files/sulotera.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/the_facility_s_production_harvest_is_underway.pdf
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/social_and_emotional_development_in_infancy_and_early_childhood.pdf
    • https://cdn.shopify.com/s/files/1/0434/1625/6677/files/jozagofaxag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/traditions_and_encounters_6th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/nokibilederoralerewijujim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/bebivaxu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000744d.bin
fa11c74a3d515312827f2f5b0b1a36dc8a0b1a0d7863eb1edfb7d619cfe71d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744D 5432 bytes
font_01_sfnt_off000086de.bin
4863a65a8f67c60f393f9dbde186ce41de66690ebc98f02d97cbd1682a510e83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DE 9944 bytes
font_02_sfnt_off0000a926.bin
8fdbf127f350f5fe396446a7fac4c304719795677deb67e98806d780edd45eaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA926 6892 bytes

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