Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0857d8843fd4965…

MALICIOUS

PDF

44.4 KB Created: 2020-08-09 04:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b89dc4eeea3d9a3cdfe2ff6efaf123 SHA-1: 3d35b3c4b01b06a7f3020c0de5f15995c5ee6199 SHA-256: f0857d8843fd4965e6eda5374ef7edee675c37080d01cf7445946728f2a2b3a0
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, a technique often used to create SEO spam or to redirect users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=about+periodic+table+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous Shopify-hosted PDF links further supports the SEO spam or link farm attack pattern.

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=about+periodic+table+pdf
    • http://files.lifelybali.com/uploads/1/3/1/3/131398542/gikil.pdf
    • http://rifog.goldcoastscience.net/uploads/1/3/0/8/130814758/namijopitovuwidimaje.pdf
    • http://files.ashleighcaudill.com/uploads/1/3/2/3/132303229/aa57e.pdf
    • http://files.askalison.org/uploads/1/3/0/8/130814118/xevuloberamo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/baverefivoxakiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/dukosarexopemokivulexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/salukizujudizizulexo.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/jedimagepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/30010510417.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2095/files/gavanaxosuvedavezapomawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/sociology_of_religion_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/alimentacion_enteral_por_gastrostomia_y_yeyunostomia.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/breastfeeding_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8264/4642/files/lazux.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_off0000710e.bin
b0e175978ff84ce602f4054828fc730ff33621e083d269326eef5e7a392b42de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 5100 bytes
font_01_sfnt_off00008274.bin
d5c637909833d1bb991899e6a94c3335cab6f8d0e966afba40bdce560cf049f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8274 9964 bytes

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