Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1d41e34a03cdc8…

MALICIOUS

PDF

44.4 KB Created: 2020-08-03 22:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55fe4872b75e0eb7562a69204845d1ea SHA-1: 35d1f39270daa406833e68b77df88c020b0328ac SHA-256: 4f1d41e34a03cdc8ca7381576b69bcefc6b4dc7d86924b8997793136d6bd92c2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text related to 'electrical engineering materials mcq pdf', suggesting a lure to trick users into clicking malicious links. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=electrical+engineering+materials+mcq+pdf
    • http://files.captivatingcriminalitynetwork.net/uploads/1/3/1/8/131856698/6783630.pdf
    • http://files.acquilus2.com/uploads/1/3/0/7/130738596/59b4a1cc7d64.pdf
    • http://files.weymouthchildfamilycommunitycenter.com/uploads/1/3/2/6/132681482/tabupef_nirek.pdf
    • http://files.chichomeinterior.com/uploads/1/3/1/4/131407214/26872.pdf
    • http://kukapedof.tamtalks.com/uploads/1/3/2/6/132696414/8305907.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/tinoxitofewamimefixarono.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/nanubiseke.pdf
    • https://cdn.shopify.com/s/files/1/0434/3398/4157/files/vexewaguvozoboso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/98147337816.pdf
    • https://cdn.shopify.com/s/files/1/0439/5443/8302/files/rilurowinurofopixapuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/oxford_handbook_of_clinical_pharmacy_3rd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/kirby_sentria_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zutowujovepenatugipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/nazezulewojubize.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/pusive.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/27120046650.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_off00006006.bin
c699a64b9fbe74a864f47c4a72c1ff4f1e5d2a8f73335d749a585fa4096ad696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6006 5556 bytes
font_01_sfnt_off000072d0.bin
394cacf72b113d348a1d449f7ce58731e13a11e34d4bf2f91ba23b274a127311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 16292 bytes

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