Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be407e9d6890532…

MALICIOUS

PDF

47.9 KB Created: 2020-08-14 17:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8023a4c8d09387916e772f39eb709f1 SHA-1: 7936b6624975e0e58d36ac11e93ac559272eb6df SHA-256: 2be407e9d6890532aa2cc32ed0e0e49c025a7f296904d34e4ef234bb1c6044ef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to 'fantasy football' and a URL that aligns with the malicious redirector heuristic. The presence of a link farm further suggests malicious intent to drive traffic to potentially harmful sites.

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=fantasy+football+2019+cheat+sheet+by+position
    • http://tulefujo.cynergy-tech.co.uk/uploads/1/3/0/7/130775350/3898648.pdf
    • http://files.chinookaircraftsales.com/uploads/1/3/1/1/131163712/bajelewiroborerulit.pdf
    • http://files.ozfreedomtechniques.com/uploads/1/3/0/8/130814227/9949335.pdf
    • http://files.carlabaku.com/uploads/1/3/2/7/132740414/8688825.pdf
    • http://files.crusadersigns.com/uploads/1/3/2/7/132712282/7c5cc062a5.pdf
    • https://cdn.shopify.com/s/files/1/0447/8589/3542/files/assimilation_in_phonetics.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/online_advertising_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/gejakodogotudoxoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/82583372853.pdf
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/meviduzuxiwiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/guzazolavazujap.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/wuzovelurumesak.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/74521415993.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/dibufenodabepema.pdf
    • https://cdn.shopify.com/s/files/1/0430/6219/8425/files/74706384740.pdf
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/15478424792.pdf
    • https://cdn.shopify.com/s/files/1/0438/4754/9088/files/berceuse_sheet_music.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634b.bin
038ea5e882438e4048c88d96823a1af2e70e51134ed3d77f2aa8df9c04185713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634B 5472 bytes
font_01_sfnt_off000075e4.bin
c609cd50d894fb9029b69b3639977a0b1d2d99e5112e3b98687ff71181fb774b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E4 14988 bytes
font_02_sfnt_off0000a471.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA471 4324 bytes

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