Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca38e757133982d…

MALICIOUS

PDF

66.7 KB Created: 2020-07-23 22:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5c2c125c56646568547bb288ce00992 SHA-1: f98826e3333fc0278166467db669605b8598d137 SHA-256: cca38e757133982d438cb85052245302807f3b9c117fd67bd94d30059514381e
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a PDF link farm heuristic, indicating a large number of outbound links, with the first being to 'cdn.shopify.com'. The presence of a 'download button' heuristic suggests a lure to trick the user into clicking the malicious link. The document body is heavily obfuscated and unreadable, but the heuristics strongly suggest a phishing or redirection attempt.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=android+app+adb+shell+kill
    • http://files.achievingflight.com/uploads/1/3/1/1/131163738/b9a0a30.pdf
    • http://files.deekincade.com/uploads/1/3/0/8/130814682/a30e9468.pdf
    • http://files.arabesqueetc.com/uploads/1/3/0/7/130740612/sodofapuda.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/46150658989.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/81408743362.pdf
    • https://cdn.shopify.com/s/files/1/0430/7874/6261/files/80989332550.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6530/3455/files/19449277795.pdf
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/rotamatudesokefagikesufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9058/files/muxamiminesitodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/80453318416.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/gukikide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/66439007184.pdf
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/wazadalidufot.pdf
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/fujasugagajixuwok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/88321221709.pdf
    • https://cdn.shopify.com/s/files/1/0437/8004/6997/files/daxawewixululoxe.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_off0000c878.bin
4cd6e2f48b502c16c73502ca98751017fadee4939eb770f71853f59827bd8de9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC878 4948 bytes
font_01_sfnt_off0000d926.bin
f11066d8a81ee8f1b09d26e69b339ea779261ccf25ccc030e0994a1461ff1331
pdf-font-stream PDF embedded font (sfnt) at offset 0xD926 10668 bytes