Malicious PDF — malware analysis report

Static analysis result for SHA-256 79800a24f8cb98fc…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 12:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e356c0abce1b3537ec0fd1424646b1 SHA-1: 438a18bbf4935ba98f9d8269e314196522509106 SHA-256: 79800a24f8cb98fc6c67db089029753efe79ff71c1933244370b1248ef7c61e7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=meaning+of+evaluation+in+education+pdf', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'Meaning of evaluation in education pdf' and mentions 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of a link farm further supports the attack pattern of directing users to potentially harmful sites.

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.ru/pify?keyword=meaning+of+evaluation+in+education+pdf
    • http://files.airporthistory.org/uploads/1/3/1/1/131164063/kedepapuxizeju_viwesuxodamexa_vijux_xigiwebe.pdf
    • http://files.rsdtech.org/uploads/1/3/1/4/131452922/tegonuno.pdf
    • http://files.communitygardensofventuracounty.org/uploads/1/3/1/3/131383358/63021100832.pdf
    • http://files.mystiquesportfishing.com/uploads/1/3/1/6/131636914/mupigelo-gijibajilinu.pdf
    • http://files.integrativefitnessnursing.com/uploads/1/3/1/4/131482976/cdd82.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/95357678142.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/mesinejesibixewixip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/zarivitezezarufeze.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xasaxikopakepiditewevumub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/chess_titans_download.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/active_and_passive_voice_rules_for_all_tenses.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0901/files/download_fifty_shades_of_grey_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1629/8393/files/fopufej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/tumekefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/kepazepipamir.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/mine_drake_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1780/files/92173916965.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/93734188599.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/memew.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_off00007553.bin
7d994baa1b1fa102296dbe4a23315be16b9bd66951abe2425d835f1205dc03ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7553 5116 bytes
font_01_sfnt_off000086ef.bin
f525c48347d3596136ea141615bb9616d5680a2e93504940ec517a96d60c513b
pdf-font-stream PDF embedded font (sfnt) at offset 0x86EF 10032 bytes