Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7a05daa676de444…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 04:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a05a75a60a8b9294f1f933882355bfd3 SHA-1: f9db71c3e57a358b7eebf1302628fd8cb4a9af7d SHA-256: f7a05daa676de444d8756f20cc53914a848ae3a548ced3fe7af202be9ca7c6d7
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=antiarrhythmic+drugs+pdf+download', which is a critical heuristic firing. This suggests the document's purpose is to redirect users to malicious content under the guise of providing a PDF download.

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.com/pify?keyword=antiarrhythmic+drugs+pdf+download
    • http://files.thejewessdiaries.com/uploads/1/3/2/6/132695472/6487160.pdf
    • http://files.worldyouthpeaceforum.com/uploads/1/3/1/4/131453253/8ac3794.pdf
    • http://files.davidwentworthart.com/uploads/1/3/0/9/130969429/bumaresigiwew.pdf
    • http://files.domenigonicharityride.org/uploads/1/3/1/4/131410158/luxejal-navozetisez-zivomiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0428/6811/3574/files/17299970367.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/numpy_least_squares.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/romiler.pdf
    • https://cdn.shopify.com/s/files/1/0432/0221/6093/files/55748233392.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1583/files/28773590225.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/12192624229.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/a_wrinkle_in_time_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/notevifidesija.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/python_replace_string.pdf
    • https://cdn.shopify.com/s/files/1/0435/5352/1823/files/50359734134.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/93043412828.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/vaduxopitarusu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/ballroom_dancing_steps_for_beginners.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_off00007a6e.bin
b52d9a1c022c9fa0448b18512a31d461ef4d3f1b299185eabe2b26f4c1341ee3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E 5752 bytes
font_01_sfnt_off00008dfc.bin
968412df104f2a1215e91b85cd91cc7ac4496b85285c042aadc6a87259adbc06
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFC 9944 bytes