Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d115148102b31a7…

MALICIOUS

PDF

34.1 KB Created: 2020-08-15 16:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 963744db4bdad3a6e803d3d328188b13 SHA-1: 6edbd7bb1a98e2853802042fc175d4de29652f4b SHA-256: 9d115148102b31a7a491d066c96465dfbd418b727117d8f171a1c03cd5770b3b
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting it is a 'Stihl ms250 operator's manual', which is likely a lure. The PDF also contains a large number of external links, as flagged by PDF_SEO_LINK_FARM, pointing to various PDF files hosted on Shopify. The primary malicious IOC is the redirector URL.

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.cc/wb?keyword=stihl%20ms250%20operator
    • http://files.cognissart.co.uk/uploads/1/3/1/3/131378918/goronefawogi_weduseru_ruwelusuvidugi_fisogepuk.pdf
    • http://files.pettyharbourmaddoxcove.ca/uploads/1/3/1/3/131379085/3527401.pdf
    • http://files.freedomheroesusahealingsanctuary.com/uploads/1/3/1/6/131607005/retutiretezese_gezani_weronobedetuxo_xarozo.pdf
    • http://vowowekul.tprrest.com/uploads/1/3/0/7/130776167/5433072.pdf
    • http://files.growingupstpete.com/uploads/1/3/1/4/131438617/folumu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/feteki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8728/1832/files/santa_biblia_de_jerusalen.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/subomazerobo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/nuevo_acuerdo_de_paz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/nowabuzitowimo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6251/6122/files/ballin_mustard_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/electrochemical_quartz_crystal_microbalance.pdf
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/20040390100.pdf
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/31578910827.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/deadpool_kills_the_marvel_universe_kickass.pdf
    • https://cdn.shopify.com/s/files/1/0431/4365/9677/files/investigating_oceanography.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/19007462397.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_off00004837.bin
4fcf87107f3fe13ce1563c370c5123ddedcfbd2b10382160449ce4f556ee86e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x4837 5592 bytes
font_01_sfnt_off00005b0a.bin
099ba3370a2f874b26c276c57dfcff8138e600dd87de3d0ca39328b082894845
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 9444 bytes