Malicious PDF — malware analysis report

Static analysis result for SHA-256 a150cb771b079369…

MALICIOUS

PDF

38.5 KB Created: 2020-08-18 14:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf488020b3c6651894930a7e4b0abd46 SHA-1: 6781ca5796b2664b4fc487825741bd1024b535e6 SHA-256: a150cb771b0793691570e5cd7f642afe7bdf380c66dee54205724f9c4a484eb7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate a PDF link farm designed to host numerous external links. The document body, though partially corrupted, contains the URL that triggered the malicious redirector heuristic. This suggests the document's primary purpose is to lure users into clicking malicious links, likely leading to phishing pages or malware downloads.

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.cc/pify?keyword=greetings+and+polite+expressions+worksheets
    • http://files.rebeccahaubner.com.au/uploads/1/3/1/8/131871614/9068884.pdf
    • http://pagevo.lovinghandsbirthandmassage.com/uploads/1/3/1/6/131606731/4427971.pdf
    • http://baxaj.younglifeeastmanatee.org/uploads/1/3/1/6/131636881/wuvom.pdf
    • http://vinafur.annotatingpmbok.com/uploads/1/3/1/4/131437421/tevisanu_dadomirimapewo_jirefug_tuzat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/93592385741.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/arjun_pandit_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/63166182698.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/lidenur.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/mopixuturugonezidukesoruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/74755616444.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/47834789510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/73121007565.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/convert_byte_stream_to_c.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_off0000576c.bin
b027d129eb57e4bae782e93cc11127936268f802d276c468c8f2e5a2aea4f15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576C 5476 bytes
font_01_sfnt_off00006a22.bin
11eadbeb16f8660d7dda2b637a8ad3af43f59c0bae70f58bf4a4d40b10dcf983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A22 10376 bytes

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