Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6498d3da423772a…

MALICIOUS

PDF

53.7 KB Created: 2020-08-17 11:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536b21e18da77bfd0762bb924e81404c SHA-1: e7c55b93097d19ee1a7fec57646beb3371073574 SHA-256: e6498d3da423772a76541573bb6f27747fdd6d5a0d8ee4934411f1287f7d64a3
120 Risk Score

Malware Insights

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

The PDF contains a document body that appears to be a lure related to interview questions, combined with a large number of embedded links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=resolving+conflict+interview+questions+answers'. Another critical heuristic flags it as a PDF link farm, with many links pointing to external PDFs. The combination suggests a malicious SEO or link-farming scheme designed to drive traffic 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=resolving+conflict+interview+questions+answers
    • http://favera.suggsworldonline.com/uploads/1/3/1/3/131381204/65aa9a.pdf
    • http://files.missjordansclassroom.com/uploads/1/3/0/7/130776841/5406440.pdf
    • http://purefe.newworkingworld.com/uploads/1/3/1/3/131378950/sibitopupimanerilamo.pdf
    • http://vimafanog.opensciencedb.com/uploads/1/3/0/9/130969352/2391417.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/stray_x_the_record.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/animal_crossing_wild_world_face_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/vojogad.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/bonanza_pizza_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/money_creation_by_chris_martenson.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/2441725181.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/weight_gain_meal_plan_male.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdf
    • https://cdn.shopify.com/s/files/1/0443/9130/1286/files/yasin_sharif_in_gujarati_language_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/vuxiremigovudotolesarele.pdf
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/mizijukexaxexalojig.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/30697811613.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008649.bin
6f6ba480c9760abe41692e57d67dc70fac4e026797e1b29bc6218b71d4948c02
pdf-font-stream PDF embedded font (sfnt) at offset 0x8649 5216 bytes
font_01_sfnt_off00009832.bin
e64c0a5c1fd20e79b6e41c48e2fb445e421cbd1ff1b3195c7274004662722751
pdf-font-stream PDF embedded font (sfnt) at offset 0x9832 10212 bytes
font_02_sfnt_off0000bae7.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE7 4324 bytes