Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a5c31c0da1cc50…

MALICIOUS

PDF

33.3 KB Created: 2020-08-01 06:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64bc152c6a17e0838ccc2ad5db680ff2 SHA-1: d5d43c172c1a1bf8f60639ceed88560c9c16ef62 SHA-256: a0a5c31c0da1cc50b31f1fdbe21a758ee94bb4c1f17f34cb9ec544c8b1963890
120 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 external resources hosted on CDNs and other domains. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to a 'computer science cheat sheet' and the malicious URL, reinforcing the lure aspect.

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.com/pify?keyword=computer+science+cheat+sheet
    • http://files.friendsofdeddingtonlibrary.org/uploads/1/3/0/7/130739664/ae93003c33.pdf
    • http://files.coreyrobinsonmusic.com/uploads/1/3/0/7/130776822/396689.pdf
    • http://files.balthazarconjure.com/uploads/1/3/1/3/131381881/vajot.pdf
    • http://files.wolfemountain.com/uploads/1/3/1/3/131398188/5ae3580e1.pdf
    • http://files.laurasmithauthor.com/uploads/1/3/1/8/131872269/8578037c.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/zawetizudapuwavesubak.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/36688984310.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/52766915088.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/40655402039.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/1996_jeep_cherokee_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/wenedutemoderigugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/84188728149.pdf
    • https://cdn.shopify.com/s/files/1/0430/8202/3061/files/63908049928.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/49970582615.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_off00004707.bin
4448ab456c7632f931fdf0cb2e9089d581aa6f06c4e171375a852fecda48767d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4707 5048 bytes
font_01_sfnt_off000057fe.bin
7853a864184547e6be70716501f9f860cea4b1e07269e04f716e80519a9bb73b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FE 9636 bytes

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