Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaebe73d81dde0a9…

MALICIOUS

PDF

41.2 KB Created: 2020-08-03 20:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4b77ea2d985c7fd9cf3c8657aa2f249 SHA-1: 613099588aa65a670af45049f21f07f83f49c7b3 SHA-256: eaebe73d81dde0a915e3e5ed37d5ea3640681e309266b6b9b458fe29dbd60f75
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting the primary purpose is to lure users into clicking malicious links that likely lead to further compromise.

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=anemia+megaloblastica+embarazo+pdf
    • http://files.familybusinessatwork.com/uploads/1/3/1/1/131163853/08b9f84e980b1.pdf
    • http://files.nixonconstructionllc.com/uploads/1/3/2/8/132816202/zamadutetijasajapis.pdf
    • http://files.unitedwithearth.com/uploads/1/3/0/8/130813694/fidevezonidaja.pdf
    • http://files.brantfordtrackandfieldclub.com/uploads/1/3/1/6/131606719/futobojuda.pdf
    • http://files.tadhgocuirrin.com/uploads/1/3/0/8/130814430/lefesixome.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/neziwinunir.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/21885814189.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/80300949597.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/53716498707.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/94250797967.pdf
    • https://cdn.shopify.com/s/files/1/0432/8197/3403/files/gavin_rosedale_adrenaline.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/welding_rod_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/39973609210.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/76855434346.pdf
    • https://cdn.shopify.com/s/files/1/0433/6241/8847/files/lesirifanoziruzoxuminuvev.pdf
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/harry_potter_spell_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/fogowijasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/96069976241.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_off0000626b.bin
58560b8d1fbd791af91300119dad013c4f35d50a034b2fa7bb2a565525594ff4
pdf-font-stream PDF embedded font (sfnt) at offset 0x626B 5656 bytes
font_01_sfnt_off00007591.bin
53fdf9dd4391c15d4ddce4d811ec2792c0c636366d0db6f40cac50bdaea4597a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 10020 bytes