Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98a68bea7eba1f8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-15 08:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9878c4eb15af2595faaa2099453d980e SHA-1: fa62f8d1b3c586a1eb2830a97c70a44b1d64c221 SHA-256: a98a68bea7eba1f823d18bc1275fad60377d3cc6424678ba06239bf47f5088fa
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of numerous links, including a malicious redirector, suggests an attempt to lure users to malicious sites. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=reduction+of+graphene+oxide+by+formic+acid
    • http://files.chronicpainandlife.com/uploads/1/3/1/8/131871740/2318623.pdf
    • http://pilek.routesadvisory.com/uploads/1/3/2/6/132682787/7562437.pdf
    • http://files.stephenhowardharrison.com/uploads/1/3/1/3/131383649/2b97e49dd.pdf
    • http://files.tldsgn.com/uploads/1/3/0/8/130874369/kosajesijimim.pdf
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/43048457414.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/94268699962.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/10711729991.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/morfologi_aspergillus_sp.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/momidabinumagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/eu4_client_state.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/4162200435.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/2095017605.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/82027419899.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/lajudaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.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_off00006ab8.bin
4c80f64e687155c1848d5ceade5b97e6c40d592d0c46986ab5e97b2c8b3c9057		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB8 5676 bytes
font_01_sfnt_off00007de0.bin
010d30664b0d729c315cb199fb4825b2c3c97b7bf7303242a4875f672b44a883		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE0 14856 bytes

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