Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b24132257c5110…

MALICIOUS

PDF

71.9 KB Created: 2020-08-10 13:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 924aa8be2f38689640182869a5685c7a SHA-1: 76102fdd5dd2e9fe164821ab702e9f7213aa5a8a SHA-256: 91b24132257c5110c59d13361ae03b965b3c4802e9735a2893bcf0d844cc2152
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though partially corrupted, suggests a lure related to 'utility function questions and answers pdf'. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The PDF structure and link farm indicate a phishing or social engineering attempt.

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=utility+function+questions+and+answers+pdf
    • http://files.gatorrughookinggroup.com/uploads/1/3/0/7/130739910/zebevodoju.pdf
    • http://files.absolutereductions.org/uploads/1/3/1/3/131398428/8e959e4ac85.pdf
    • http://robid.salemlakemills.com/uploads/1/3/2/6/132682076/mokigel-fojigilurifu-majazubolonek-kokedir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/zivugamuvasob.pdf
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/53602100535.pdf
    • https://cdn.shopify.com/s/files/1/0437/5756/8151/files/darth_sidious_s_midichlorian_count.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/38480601699.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdf
    • https://cdn.shopify.com/s/files/1/0440/9327/6312/files/33256109346.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/zadoxagux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/acetazolamida_mal_de_altura.pdf
    • https://cdn.shopify.com/s/files/1/0429/1824/8601/files/4834243677.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/71266097927.pdf
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/52898945225.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/wonirudumejuvopuziveb.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_off0000bd8a.bin
9af661caad4ea0d509b2f003b14a9efff327fef6a45d7282d386d7e64ba31314		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8A 5460 bytes
font_01_sfnt_off0000d040.bin
d22255ba7fc3b3338d71ea325207163cffee7d9f374a2ef52e3abad8f6790fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD040 14252 bytes
font_02_sfnt_off0000fd1b.bin
43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1B 16132 bytes

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