Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c5e0085e55827f…

MALICIOUS

PDF

44.0 KB Created: 2020-08-10 10:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcc4dd73ce1c3542bb9e91899cf8d642 SHA-1: bcf3730bf1790c58b27de36abbfdc9f27a402f32 SHA-256: c1c5e0085e55827fd1ac1684b325f2f3037f37b83d6c32ef9f1fd545ab7ba674
150 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, but one critical link directs to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'circuit breaker abb pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=circuit+breaker+abb+pdf
    • http://files.strengthasoneleadership.org/uploads/1/3/1/3/131380985/bewesigedesozoje.pdf
    • http://files.thrivingdrs.com/uploads/1/3/1/0/131069859/2ef4091da820b.pdf
    • http://files.fourthuu.org/uploads/1/3/2/8/132814136/govaruz.pdf
    • http://files.patrickracingbillet.com/uploads/1/3/1/4/131453109/newoji_tuwonebugegi.pdf
    • http://files.objects-of-grace.com/uploads/1/3/2/8/132814050/6628c8f8a.pdf
    • https://cdn.shopify.com/s/files/1/0431/6135/4404/files/nibozug.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/76899804088.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/jodusipudefopivaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/3218/9860/files/cephalosporins_mechanism_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/xavelorugekazipevijosuli.pdf
    • https://cdn.shopify.com/s/files/1/0433/6120/6422/files/60707763629.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6921/files/rupawozenugadam.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/50872612191.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/botania_black_lotus.pdf
    • https://cdn.shopify.com/s/files/1/0434/8638/0189/files/nurigirobifos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62894204366.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/mizub.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_off000061a4.bin
c8a0f9389a352325cdfe12bb7653f3b194cf156baf32079e2f1bd6322c224352
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 4832 bytes
font_01_sfnt_off00007224.bin
67e53217a3b12490f45d58ff832daf64faf00e20d797c377466af395b2f6e8c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7224 10192 bytes
font_02_sfnt_off00009500.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9500 4324 bytes