Malicious PDF — malware analysis report

Static analysis result for SHA-256 99bec526d035be39…

MALICIOUS

PDF

56.4 KB Created: 2020-08-06 00:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab7f606f6a8e9708beeef6b2fc4ab5f1 SHA-1: 2f92b218419d6bc4cff4446b691a1f34c972d256 SHA-256: 99bec526d035be39208aaa12e463a973a00b47e0d6678c89431cb81c9f4c77f7
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'the book thief read online free pdf' and the malicious URL itself, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=the+book+thief+read+online+free+pdf
    • http://files.littlelotuscafe.com/uploads/1/3/0/7/130775145/f889c0.pdf
    • http://naropu.natalieteale.com/uploads/1/3/1/4/131453574/e97fd50a9.pdf
    • http://files.asiamitchelltabb.com/uploads/1/3/0/9/130969717/acfd18cecfc9.pdf
    • http://files.saraelizabethtaylor.com/uploads/1/3/0/7/130739664/dokux.pdf
    • http://files.13moonsbloodmysteries.com/uploads/1/3/2/8/132816066/kudasojajagimitavene.pdf
    • https://cdn.shopify.com/s/files/1/0438/5266/0901/files/40520724904.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92313200312.pdf
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/tasokitomiwiwewiwo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/the_curious_case_of_benjamin_button_short_story.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/48201846814.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/49222529395.pdf
    • https://cdn.shopify.com/s/files/1/0437/3879/2085/files/02x05_blue_s_clues.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/11733891631.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/tetopasazeget.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4455/files/catalogo_de_avon_campaa_8_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/6785/8334/files/76017732539.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd6.bin
08eb819e1657b2ccb95887e42de79205b3b7255343a6c58482a3f71c17e23dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD6 7512 bytes
font_01_sfnt_off000088ff.bin
b26dfa6b29b340ef41fb6722317cbfb658e4e7925b0778079c74a26aef6387cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88FF 5104 bytes
font_02_sfnt_off00009a4d.bin
bacd5ab3bc55efeed96dc9d751526689f80d75d3a9757a44e3d6d0523d813aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4D 10724 bytes
font_03_sfnt_off0000bec3.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC3 16092 bytes

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