Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b084fefd1b6780…

MALICIOUS

PDF

54.0 KB Created: 2020-08-05 00:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42e9cddc02a36f11b27f274030d79e63 SHA-1: 0dae1c3522961df678460ae45f3ab4b462c8095e SHA-256: 68b084fefd1b67803f964b354590a0f2ae1b74ff5cc6e1d2cbbd7b77d58018bb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=project+risk+management+process+pdf'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this malicious intent. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier also strongly flagged this PDF as malicious.

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=project+risk+management+process+pdf
    • http://files.hisembracinglove.com/uploads/1/3/2/6/132695257/5016008.pdf
    • http://files.maccampusfrosh.com/uploads/1/3/1/3/131383247/kopelik.pdf
    • http://files.shanazpasha.com/uploads/1/3/1/4/131453124/5351135.pdf
    • http://files.doublefeaturepreachers.com/uploads/1/3/1/4/131438323/1551742.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2412/9946/files/jirage.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/89647433170.pdf
    • https://cdn.shopify.com/s/files/1/0438/9643/8936/files/76866625015.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/winevofuwunab.pdf
    • https://cdn.shopify.com/s/files/1/0434/0377/2056/files/52422542104.pdf
    • https://cdn.shopify.com/s/files/1/0440/5500/3286/files/xixuvale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3669/files/what_is_an_example_of_a_simile.pdf
    • https://cdn.shopify.com/s/files/1/0432/8023/6702/files/42901601122.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/mugaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/64669718609.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_off000095e0.bin
cc9137b6be8f8d1e1ad7ce71a0d9577a7bae7dd1bb9dfcea7f60d4739983951f
pdf-font-stream PDF embedded font (sfnt) at offset 0x95E0 5584 bytes
font_01_sfnt_off0000a8d5.bin
bdc7e8657b95b10559ae9104f982d3f8b5ab3a5b3640595669a7c48e7fde9704
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D5 9948 bytes