Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62f80c73aa4729c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-20 00:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146bca0e471d02e1a2db29c23de17429 SHA-1: 19a51ec78e47975444eb0a7443972201db141585 SHA-256: e62f80c73aa4729c94c31bf967fc8b430575fac807b5b1b556169ae43c57aad7
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'secondary school final report'. The primary malicious URL identified is https://ttraff.com/pify?keyword=secondary+school+final+report+common+app, which is likely used to redirect the user to a malicious site for phishing or malware delivery. The presence of many Shopify links, some marked as benign, suggests a tactic to blend malicious links with seemingly legitimate ones.

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/pify?keyword=secondary+school+final+report+common+app
    • http://zetix.comfycozycleaningservice.com/uploads/1/3/1/4/131406557/74557.pdf
    • http://ditadixes.hissyfitcoons.com/uploads/1/3/0/8/130814328/91fa71.pdf
    • http://dubip.iniic.com/uploads/1/3/0/8/130874067/badolev_ritubeviw_jagisunazezi_kenotakubanokej.pdf
    • http://kojux.f-c-f.net/uploads/1/3/0/7/130738993/rugazapes.pdf
    • https://cdn.shopify.com/s/files/1/0431/0981/0327/files/learning_of_excel.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/27396593909.pdf
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/44636358542.pdf
    • https://cdn.shopify.com/s/files/1/0430/9542/5191/files/lajakajaxotikakarukopobob.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/87858260215.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/48702210477.pdf
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/tamogox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7579/files/street_fighters_4_arcade_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/38691581072.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/how_to_say_numbers_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/medicamentos_y_para_que_sirven.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/dublin_airport_map.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/fepafopuwonibo.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_off00006190.bin
d5b648836c1ffcf6ae6e0bffff83791ca0344733013c8f5d904b2e0a70223d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 5600 bytes
font_01_sfnt_off00007468.bin
c4a85a27d8e0f4f139531883f3fc986b71d52cbac1e297ce8bea2b198516dbc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7468 10120 bytes

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