Malicious PDF — malware analysis report

Static analysis result for SHA-256 543f0b87237ece2a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 09:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 473af1ad7d2d90c716d69e969cfc2d41 SHA-1: b8182fcdd1359ebd9d2ee170def12c6f5d474cd2 SHA-256: 543f0b87237ece2a0056920ce384a80404331dae04367a0752492de885091b31
120 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=robotica+industrial+libro+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links, many pointing to Shopify domains, indicates an attempt to obscure the malicious destination and potentially leverage legitimate platforms for hosting or distribution.

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=robotica+industrial+libro+pdf
    • http://waged.hadassahcalligraphy.com/uploads/1/3/1/6/131606289/lalufilolomuvip.pdf
    • http://files.woodturnedwood.com/uploads/1/3/0/7/130776592/2446587.pdf
    • http://files.cebutoursandtravel.com/uploads/1/3/0/9/130969915/fipobodedipur_mamopaki_fexuj.pdf
    • http://files.estesartsdistrict.org/uploads/1/3/1/3/131380299/623180.pdf
    • http://punabufu.mkfitpassion.com/uploads/1/3/1/0/131070767/7500418.pdf
    • https://cdn.shopify.com/s/files/1/0431/8792/9245/files/wasumupisakerosaxirarit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/velorupepogonejaxatugudew.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/56321915312.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/how_to_make_redstone_repeaters.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/bastar_university_change_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/1134/1479/files/jidaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/convert_to_black_and_white.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/89826106888.pdf
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/ehsas_program.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/wefokovokasiloduro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/business_school_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/tofame.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_off00006352.bin
a05bf2d73f310a10f3f115cf4d9cd5230cadf7a138f34cebd82a7df3653703ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5060 bytes
font_01_sfnt_off0000747c.bin
5e7d3403160ccab48fc2a077caf5379151aa65e3d23b1daa4befbd549465cc2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 10008 bytes
font_02_sfnt_off0000967f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x967F 4324 bytes