Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da67a36f94befb9…

MALICIOUS

PDF

81.2 KB Created: 2020-07-28 11:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af06b7e1f5c81e420a2f31a739a5f06b SHA-1: 83d9da84121ff03fc3cb9df091f8a000af0ef9b0 SHA-256: 2da67a36f94befb978b1444ec409395b2c39aaec56cf2682f147ebb5ed20508a
150 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL that is flagged as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'happy birthday cake with name images'. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to distribute malicious content. No scripts were extracted from this sample.

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=happy+birthday+cake+with+name+images
    • http://files.berncograssrootsdems.com/uploads/1/3/0/8/130874647/31f3a286432.pdf
    • http://files.harvestupc.com/uploads/1/3/1/0/131071289/muxilinatexik.pdf
    • http://files.lakeisleretreats.com/uploads/1/3/2/7/132740682/xamikexinefekoz.pdf
    • http://files.footmadbirmingham.org/uploads/1/3/0/9/130969655/511256.pdf
    • http://files.neuroasl.com/uploads/1/3/0/8/130814106/71d20d927fec0c.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/polosofipovuwifupubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/leropipiwefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/roribomepigufataxawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/dujewakaxivagitoxuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/80689828253.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/sozurutudoxozonifujudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5350/6969/files/79049715806.pdf
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/fodamikanekaloxor.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/baxisarevuxiwufosowusub.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/kakikesafubigatukiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/45842033125.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2093/files/ludazuruwujefasidag.pdf
    • https://cdn.shopify.com/s/files/1/0434/4102/9276/files/85307373020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/68760256792.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_off0000f196.bin
6b8b53b30f4af1c343c153c0f5e02f7fe167e4fcb14b2accc244fc236677c9b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 5492 bytes
font_01_sfnt_off0001041b.bin
eb3c06fce7714167f20f112929e1b9b250ad6372b163700ebedaa2f04015b4a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 9816 bytes
font_02_sfnt_off00012550.bin
67b82d20858e06e97c73e6d25d37a64fc962de70053d7c9ad1b6136a9a3caf3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 4764 bytes