Malicious PDF — malware analysis report

Static analysis result for SHA-256 191b9b60f636a432…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 14:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d78cee3d466d20f901b5f6bde2e581e SHA-1: 8d0d3f45167b6a4f41c0dd1957bbbedfa7cf512b SHA-256: 191b9b60f636a43246ea36aae7703ed0618322d09a31ed7d3b71a694dde67f82
120 Risk Score

Malware Insights

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

The PDF file contains a link farm of 16 external PDF links, with the primary redirector URL being https://ttraff.com/wb?keyword=samhsa%20tip%20manual%2035. This indicates a likely attempt to lure users to malicious content or phishing sites. No scripts were extracted from this sample, and the document body was heavily obfuscated, but the presence of the redirector and link farm strongly suggests malicious intent.

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.com/wb?keyword=samhsa%20tip%20manual%2035
    • http://files.phfabrication.net/uploads/1/3/0/7/130740589/kuzefafabiz-difojumukad.pdf
    • http://files.kidstopinc.com/uploads/1/3/1/4/131453998/45d973b32.pdf
    • http://files.mrchriswells.com/uploads/1/3/1/8/131871740/wupusiwumomur_pefadonuf_rasowod_lefan.pdf
    • https://cdn.shopify.com/s/files/1/0440/8829/5576/files/free_ancient_aramaic_bible_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7269/files/vebafowugowonalilabinoj.pdf
    • https://cdn.shopify.com/s/files/1/0438/1091/4466/files/altivar_11_instrukcja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90067119925.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/free_game_resources.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/vezakememafubipikobojevar.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7962/files/56695257073.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/rekuveludavenugirozoxiluj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1237/5207/files/59560195057.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/6137631973.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/29858687640.pdf
    • https://cdn.shopify.com/s/files/1/0428/4134/2108/files/povawivule.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/total_capacitance_in_series_and_parallel.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_off00005aec.bin
1dd14667f75c24e06903409de2ad5826298b7628b07abc5650a642ed8ade949e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AEC 5356 bytes
font_01_sfnt_off00006d00.bin
dbc8074fc09202aa08cf5bbf210aa770a45a48a42f596cf06a9aafdc2948babe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 10952 bytes

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