Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec99c718df6c4bb…

MALICIOUS

PDF

46.3 KB Created: 2020-08-24 08:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 512e5bbeff8eeb58703adf3354dfbbad SHA-1: 60d0d5428df6cd7fd4fbc4a78bdf59696c2d2a47 SHA-256: 8ec99c718df6c4bb04740d8f589bae6252f25a024158bac444e850f937c26578
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and a lure related to enabling flash in Chrome on Android. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm intended to obscure the malicious redirector. The file is likely a social engineering lure to trick users into visiting a malicious site.

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.cc/pify?keyword=enable+flash+in+chrome+android
    • http://files.anneremmel.com/uploads/1/3/1/3/131398347/5754285.pdf
    • http://files.prigitalsolutions.com/uploads/1/3/1/0/131071076/577897.pdf
    • http://files.williamsburgrec.com/uploads/1/3/2/6/132682745/tagogumolizim_fofuzipupi.pdf
    • http://files.earthmetaldetecting.com/uploads/1/3/1/3/131383486/0aa6096dc92d1.pdf
    • http://vakefuz.creative-twinkles.com/uploads/1/3/1/8/131856281/zejegasez.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/java_collections_sort.pdf
    • https://cdn.shopify.com/s/files/1/0428/8954/3836/files/lavikuduvowutiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3584/3994/files/boviw.pdf
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/zemaxibeloxax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/lateralization_soil.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/kanes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/network_screenplay_paddy_chayefsky.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/pijezolula.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/fumigufefoj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9829/files/lovagugekigezuwat.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/kiwoliwazan.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_off0000629a.bin
dcdc4fda64d50cd9562ba74a7edc7d9cece7837010f61e71bda462cae1f013c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x629A 5360 bytes
font_01_sfnt_off0000749d.bin
eae58374b612cb8b0ef25cc542f01be0fefdadc2b7ff87533de75b3d32e7009b
pdf-font-stream PDF embedded font (sfnt) at offset 0x749D 10144 bytes
font_02_sfnt_off00009784.bin
f8a29ee99fa618751840f4bb470ac1c8deea637908770bd91c39adf1e18f92d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9784 16084 bytes