Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5d9b60bd85e881…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 00:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 758a60019627f8713e38f22ad91def1f SHA-1: e37de72b450b9327891326d29d24a59f4dbb0de3 SHA-256: 6d5d9b60bd85e881a4455f7690944cb04709407a30839a907c5ca14ea065e3f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high density of external links, many of which point to a redirector service known for malicious activity. The primary malicious URL identified is https://ttraff.ru/pify?keyword=android+apps+with+windows+10, which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to the malicious URL, suggesting an intent to deceive users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=android+apps+with+windows+10
    • http://tuzejad.miscellaneoussushi.com/uploads/1/3/0/7/130776485/kizagejovajako.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7000/4126/files/49161480679.pdf
    • https://cdn.shopify.com/s/files/1/0444/4664/6439/files/18512170572.pdf
    • https://cdn.shopify.com/s/files/1/0432/1512/6685/files/fasajinu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/label_maker_clicker_heroes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/burial_rites_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/38083741151.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/pinavezagowazimagejivata.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/saxinameda.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/the_adventures_of_tom_sawyer_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/bookeye_4_kiosk_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/4742/9031/files/nirivofusasukisub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/bus_166_nj_transit.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006999.bin
0fe73a20a834e2ca6c40ada183fa0840a0c6b5186519c3f38a802aaa416c0c31
pdf-font-stream PDF embedded font (sfnt) at offset 0x6999 5288 bytes
font_01_sfnt_off00007b9b.bin
cb3e2ed4aa8a4cf3c5b86eef35302e5ab38dc5e3794972b27bbe389822839139
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 9896 bytes