Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f1affd6ed7af3a…

MALICIOUS

PDF

34.2 KB Created: 2020-08-05 23:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03805924acef6eaf672676e63fd214e0 SHA-1: 6780e95c59ae7bfcd10814e99f25799cc82126e8 SHA-256: 31f1affd6ed7af3aad0722fbd273d3c5feaae54770c0dedf1c45fb35140a3291
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to academic solutions and includes the primary malicious URL. The presence of a link farm heuristic further supports the malicious intent of distributing links to external content, likely for malicious redirection or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=bsc+1st+year+math+solution+pdf
    • http://files.logosassociatesltd.com/uploads/1/3/0/7/130774990/8c100206a4475b.pdf
    • http://files.ecp-wi.org/uploads/1/3/1/1/131164424/b059eab2.pdf
    • http://lofaw.townofgreenport.com/uploads/1/3/0/7/130738836/nizenabo-wupagizeke.pdf
    • http://files.huskyjunk.com/uploads/1/3/1/3/131379085/0af2c02b.pdf
    • http://files.barbarabairddesign.com/uploads/1/3/0/8/130874161/41becd71fde.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/pizapitof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/88072061879.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/malotunozimevugodowifig.pdf
    • https://cdn.shopify.com/s/files/1/0432/6083/8050/files/23617075513.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mavadusuwavofemikedoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/54333329518.pdf
    • https://cdn.shopify.com/s/files/1/0429/1212/0998/files/53656686590.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/xefomavarabikuva.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/erin_go_bragh_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/elettaria_cardamomum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/7986954982.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/nixotopedilirivukudul.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/auxiliary_and_modal_verbs_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/voririsomikidak.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_off000047c0.bin
ea23b08e04a021ba53d97939c90fdff5d200909bb19074087d89108cd88f1d2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C0 5600 bytes
font_01_sfnt_off00005ab4.bin
a24dbe0e4cd5a397646e807d328e80ec0b29daaab8bc82107a76bf7703a18d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB4 9656 bytes

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