Malicious PDF — malware analysis report

Static analysis result for SHA-256 c534273bddfb868e…

MALICIOUS

PDF

45.7 KB Created: 2020-08-09 17:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7914179acc33844f172ebbb426044171 SHA-1: 171879f7c34a19f7dee4ab9e0f60d9350f9b3d0c SHA-256: c534273bddfb868eacfb7ea6000787e8e941ad453b0a4f65198a8673c9172dd7
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 Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. This indicates a link farm attack designed to drive traffic to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector URL is a strong indicator of malicious intent.

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/pify?keyword=aristide+torchia+pdf
    • http://files.geraldsandau-sculpture.com/uploads/1/3/1/0/131070633/9625127.pdf
    • http://files.jreaycreations.com/uploads/1/3/0/7/130739974/8326416.pdf
    • http://files.thomasgkelleylaw.com/uploads/1/3/1/4/131437930/1957764.pdf
    • http://files.harlanparkbaptist.com/uploads/1/3/2/6/132695478/2354188.pdf
    • http://files.fallscreekcc.com/uploads/1/3/0/8/130873728/4964421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0133/9304/files/34196446272.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/21901322323.pdf
    • https://cdn.shopify.com/s/files/1/0436/6991/3753/files/cowboys_from_hell_tab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8530/6782/files/already_just_still_yet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/29238235158.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/kobogupamikulew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/80028797489.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/nagifukewunevagifotaxixim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4366/files/78189691595.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/craftsman_weedwacker_27cc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/82685556098.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/tewetanuberekuxin.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/wukiga.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_off0000760b.bin
fd2ef77ccf08a524468f9293348caeff64333044aca5c4619288db11e7b8d0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x760B 5200 bytes
font_01_sfnt_off000087b6.bin
1ff0a1a6eb581b7d43fa336ba5e97f91900ba615e294f10ee1f7059b968a9def		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 10104 bytes

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