Malicious PDF — malware analysis report

Static analysis result for SHA-256 811eda72ab48cabc…

MALICIOUS

PDF

58.5 KB Created: 2020-08-05 01:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd8d2da082765505229bfde70de468c5 SHA-1: ec1109fac1424e11a162993fad5a1a805a216406 SHA-256: 811eda72ab48cabc577a560cc5c77d72899d074c633a171af34fdfb3f08ee4b4
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious due to a high number of embedded external links, a common tactic for redirecting users to malicious sites. One specific URL, https://ttraff.cc/pify?keyword=imperative+definition+pdf, is identified as a malicious redirector. The document body contains garbled text but includes the same malicious URL and a large list of other URLs, many hosted on cdn.shopify.com, suggesting a link farm designed to lure victims. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=imperative+definition+pdf
    • http://files.kickass-stainedglass.com/uploads/1/3/2/6/132680976/6786519.pdf
    • http://files.reflectionsontheharboursalon.com/uploads/1/3/1/4/131406592/katuzu.pdf
    • http://files.pictoucountyrootsforyouth.com/uploads/1/3/0/8/130814980/d7af8c7f27eb3eb.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/balojewibukotitefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/gl-_mt300n-_v2.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/louisiana_market_bulletin.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/50795298955.pdf
    • https://cdn.shopify.com/s/files/1/0439/4713/1035/files/55347000841.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8664/files/vuzexojasidikazodusoxavej.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/budaxeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/sevipefigezar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/deginoxopiv.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/94480996654.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c296.bin
222593e69b5b48b9a49748f8c48c4881c889e130adb296aa7d82c2c4a16a26db		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC296 17336 bytes
font_00_sfnt_off00006856.bin
8e8b89c38c7f801ee5b046ccee16e8803bbc12f71252f391a9f5e7f65ca0ba58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 3700 bytes
font_01_sfnt_off0000758e.bin
83fb82fed29dcbbd1bdb2d803beccd6a08f2548f4b86e91d1708a244dde1986b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 4972 bytes
font_02_sfnt_off0000865a.bin
ad0b41c8897c251ffb17156f769b8266f9dc7d60960f17330f06efa66029e7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x865A 7948 bytes
font_03_sfnt_off00009c8c.bin
10226345dbf0c573028f4aea53b2f3b0aa75d2215ae16c377e0024ffebe5b61a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8C 11420 bytes

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