Malicious PDF — malware analysis report

Static analysis result for SHA-256 38828742a6321589…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 21:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e82514717eee516e780d877a904312e7 SHA-1: b966d9b4800d90f936fe738941e87d2e78850f38 SHA-256: 38828742a6321589a35b3d1b7c871692a34e8ffe648186565e06e871672a10ae
130 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting PDF files, and one critical link to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'abbyy pdf transformer 3.0 serial number' and includes the malicious URL, suggesting a lure for cracked software. The presence of a visual download button heuristic further supports this phishing pretext.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=abbyy+pdf+transformer+3.+0+serial+number+laz%25C4%25B1m
    • http://nomosedor.whspta.com/uploads/1/3/2/3/132303410/namiwebijufepopibit.pdf
    • http://kigelosog.robertsiteach.org/uploads/1/3/2/6/132682883/nupate-tilazopeb-wadedok.pdf
    • http://jajedix.nddistrictyouth.org.uk/uploads/1/3/1/4/131406437/6244726.pdf
    • http://files.madebyloulou.net/uploads/1/3/1/8/131871891/59bfb6ba928ffb6.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/18767679586.pdf
    • https://cdn.shopify.com/s/files/1/0433/5229/3541/files/kudigagawofiro.pdf
    • https://cdn.shopify.com/s/files/1/0436/9927/3896/files/7597218319.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/list_of_cities_in_the_usa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/95176804779.pdf
    • https://cdn.shopify.com/s/files/1/0437/3371/3050/files/70785906935.pdf
    • https://cdn.shopify.com/s/files/1/0441/1850/7672/files/photoshop_hosts_file.pdf
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/vavidam.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/biluwevowofaxelosuvi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0406/6967/files/demuzipejenaxib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujufizolotedugogu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3535/0424/files/67022281381.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/kijemomatoralivonelopedab.pdf
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/abacus_level_5_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/asymptomatic_hyperuricemia.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_off00005c34.bin
69410b9b852cfdd8794709ad7e602c0fd277406ebea89a5f8d9f414881cd1e12
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C34 5836 bytes
font_01_sfnt_off0000700a.bin
1924368fd1556b7196da8d603c115e246f2e6145a98d54ed95ef5270e8852247
pdf-font-stream PDF embedded font (sfnt) at offset 0x700A 10332 bytes