Malicious PDF — malware analysis report

Static analysis result for SHA-256 40a250c5d45a50ef…

MALICIOUS

PDF

59.8 KB Created: 2020-08-05 13:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fba902cfdd470beaaa730cd93326fff9 SHA-1: d36566bbb2263ba1d1c361527e24bd1251222486 SHA-256: 40a250c5d45a50ef6c79a18b3841ee5519759801f658389de71ffb791453e31a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of this document being used for malicious redirection. The ML classifier also strongly flagged this PDF. The primary malicious IOC is the ttraff.com URL, which likely serves as a gateway to further malicious content or phishing pages.

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/wb?keyword=clasificacion%20de%20los%20conjuntos%20numericos%20pdf
    • http://files.ruthdeyoung.com/uploads/1/3/0/8/130873947/peduwab_walirulofosi_mixabajuvunana.pdf
    • http://files.washington-scottish.com/uploads/1/3/0/8/130874318/8b0f395751b7b3.pdf
    • http://files.thejewelvox.com/uploads/1/3/2/7/132740978/nasoteb.pdf
    • http://files.brandywinepawpatrol.com/uploads/1/3/1/3/131379540/4241923.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/zixifaliva.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/44897128802.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/93204319217.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/grade_4_math_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/54601344178.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/gender_barriers_to_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/brevi_storie_per_bambini_di_prima_elementare.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/12649407151.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/firifetiputosabefizuka.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2183/files/nims_100b_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9459/files/denesogajekosamatot.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7941/files/wwe_theme_song_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/95571520775.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_off00007edc.bin
b43df9991b1caacc7bd2541e4759d743fba6c3e49e2125936bf23fc70d9bddee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 5280 bytes
font_01_sfnt_off000090b5.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B5 1800 bytes
font_02_sfnt_off00009942.bin
739ce921ec7b68d0717c13dad299893f5f5ed3055bae934ccb85c3a6dfbc7980		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9942 16252 bytes
font_03_sfnt_off0000cb72.bin
54ae156e1cb4ca24283df734cb3e391abab0b08df543301e630bb3f9031a6bdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB72 16352 bytes

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