Malicious PDF — malware analysis report

Static analysis result for SHA-256 941e71a281acf1d3…

MALICIOUS

PDF

40.6 KB Created: 2020-08-27 15:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c53248b76e8651c0cd6573e2e3122675 SHA-1: 3dde893c6cfbe372d496781a701c8eb2184d2b50 SHA-256: 941e71a281acf1d3e97961fcad5d5f77c7d814dabd978e107c43d0a5dc5d1732
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely used to distribute further malicious content or lead users to phishing sites. The presence of numerous links, including the malicious redirector, suggests a distribution or phishing campaign.

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=object+pronouns+e+possessive+adjectives
    • http://files.sutherlandbeatson.com/uploads/1/3/1/3/131384024/ef3a198fc3591df.pdf
    • http://tovivaz.ivanazivic.com/uploads/1/3/1/3/131398140/4607876.pdf
    • http://fopodeso.ajrplasteringessex.co.uk/uploads/1/3/2/6/132680866/012c11.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/international_truck_parts_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/how_to_trim_a.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/3788091445.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4229/files/80165386596.pdf
    • https://cdn.shopify.com/s/files/1/0451/1278/7109/files/alkynes_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/sifunisojenijapen.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/89343894331.pdf
    • https://cdn.shopify.com/s/files/1/0448/1197/6855/files/caterpillar_forklift_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/ambient_city_sounds.pdf
    • https://cdn.shopify.com/s/files/1/0453/2790/9019/files/asrock_ab350_pro4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/deped_feeding_program_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://cdn.shopify.com/s/files/1/0432/2420/3424/files/49815769848.pdf
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/algorithm_complexity_cheat_sheet.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_off00006038.bin
47f9095fa0f91417933a495592b2b00fb4b2677d4033b9d31cd1b70815d53c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 5336 bytes
font_01_sfnt_off00007270.bin
4d35683c35be7b00c16836d6974a924bf8971dec1eb93a5412f8e6c3e427926c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7270 10236 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.