Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd9a5a98c9d9550…

MALICIOUS

PDF

52.5 KB Created: 2020-08-16 10:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d9230c948fb5b8c7511a0b248065822 SHA-1: 88a79de99ed0e387ad92ef10ee294e1ef59d7faa SHA-256: ecd9a5a98c9d9550fb4904da4c8d418266e74129d2fb4422f8f3f488905d0cfe
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm designed to lure victims. The primary malicious link, 'https://ttraff.cc/pify?keyword=amcas+application+course+classification+guide', redirects to further malicious infrastructure. The document body, though heavily obfuscated, contains the lure text and the malicious URL, indicating a social engineering attack.

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=amcas+application+course+classification+guide
    • http://xedilelo.webbrhp.com/uploads/1/3/2/6/132680813/35222.pdf
    • http://gejuxajes.jillianabbott.com/uploads/1/3/1/4/131437850/junebifoka.pdf
    • http://bezetu.thecut.studio/uploads/1/3/1/0/131070847/sujeferuwovu.pdf
    • http://files.7sunsprintmaking.com/uploads/1/3/0/8/130814003/pusunegipukad_febokenikaxa_nujana.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/zobigixuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5536/3734/files/c_append_int_to_string.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/taperuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/southwest_airlines_case_study_solution.pdf
    • https://cdn.shopify.com/s/files/1/0436/3278/7609/files/79788833053.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/fewopanu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4718/2759/files/goboka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/pajarulifukoso.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/7514063634.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/
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/zobigixuw

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008f90.bin
4f339f30239db3622385a31ceb2434c909b18d35112cf0bfe2ec413d6b957d14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F90 5464 bytes
font_01_sfnt_off0000a201.bin
0bfbd82c4e5d3fb2f4678fac231db3acde9ff8eb2d12a9e6b7ddbd9e013330eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA201 10140 bytes

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