Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc0b17f4fa1e019…

MALICIOUS

PDF

37.9 KB Created: 2020-08-08 13:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac356097227202568ff4277beebb2c7b SHA-1: bdb985ad510f43b765b5553884599340af6cc304 SHA-256: 3dc0b17f4fa1e019229ee97fae7986eee43f082141ffcd949716d20298e13e67
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicative of a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=aaoifi+fas+1+pdf, which likely serves as a redirector to a malicious destination. The document body contains garbled text but also includes the same malicious URL and numerous benign-looking Shopify URLs, suggesting an attempt to disguise the malicious intent within a large volume of links.

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.cc/pify?keyword=aaoifi+fas+1+pdf
    • http://files.ecardsvs.com/uploads/1/3/1/3/131380739/b9cc473363d2.pdf
    • http://files.arlordpac.ca/uploads/1/3/1/4/131411688/478535.pdf
    • http://files.marathonembroidery.com/uploads/1/3/0/9/130969153/af04a146be.pdf
    • http://files.touroftasmania.com/uploads/1/3/0/8/130813458/43f8ee27243.pdf
    • http://jejuxa.act-sat-tutors.com/uploads/1/3/2/6/132682076/a2a1a.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/dotafupinovolidowuwos.pdf
    • https://cdn.shopify.com/s/files/1/0438/2438/2114/files/giduvoxen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/centrifugal_pump_characteristic_curve.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/411_missing_persons.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/jasuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/cfa_exam_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6376/files/foxepave.pdf
    • https://cdn.shopify.com/s/files/1/0435/3658/0757/files/notudasiwedipuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/2473/5643/files/mimawegawuzotu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/polmicas_na_igreja_augustus_nicodemus.pdf
    • https://cdn.shopify.com/s/files/1/0437/7824/4765/files/air_booster_pump.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/rodijuguti.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_off00005780.bin
27080db012b10d6f23668c80537cee78971216caa80dd029b4bf813f3e40252f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5780 4948 bytes
font_01_sfnt_off00006879.bin
d05d5f86c496e395cc12d0dcd198a56876d15b6ceb6cbc763003589e2591a4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 10292 bytes

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