Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c3a98a5971aca5…

MALICIOUS

PDF

51.5 KB Created: 2020-08-11 02:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66b6856e5c603b8d4d3ec904a243c508 SHA-1: 5c35082ec4b09f959c291c2a3223f9d27fa0f3ad SHA-256: e0c3a98a5971aca5a3b475d34c9ae53508830c2a41d0287cd92c6f717f08d5d2
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a book PDF, which is likely a lure. The primary malicious IOC is the redirector URL, which is used to obscure the ultimate destination of the 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=abhinay+maths+algebra+book+pdf
    • http://files.collegeroyalsociety.com/uploads/1/3/1/3/131379899/2327185.pdf
    • http://files.contiviohelp.com/uploads/1/3/0/7/130739742/xadabawofa.pdf
    • http://files.goodstuffbyshalonne.com/uploads/1/3/2/8/132814589/c587a08383434.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.lewesglass.com/uploads/1/3/1/3/131379117/b8f016109eda2ec.pdf
    • https://cdn.shopify.com/s/files/1/0429/7906/6009/files/gedavilogixarinamegaxojun.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/feviz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/kadabudalogog.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/canon_ae_1_program_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/27381706573.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/65498732373.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/arduino_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/54507701691.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/55053466182.pdf
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/befogitupasijigokakusawal.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/bubble_sort_algorithm_in_c.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_off00006a07.bin
3353dfa7f3d2afd75181791b2055f5a99b3180f5560447470afd914bc4d879b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 5748 bytes
font_01_sfnt_off00007d5e.bin
fe568b4f3418e8c6dba416308ce350104bbed44014dbfd80baad21e63fd739a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 10064 bytes
font_02_sfnt_off00009fed.bin
4de7c919394c9ea97e75ef67a483986912f35988b67c1d02ab75f2887e42f9ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FED 10356 bytes

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