Malicious PDF — malware analysis report

Static analysis result for SHA-256 b901f00170b8eb8f…

MALICIOUS

PDF

45.2 KB Created: 2020-08-28 07:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 437794bfdd95bbaa6c38386427680b89 SHA-1: de0b5a8546ec8dd254160252dd5c6b0c506d2068 SHA-256: b901f00170b8eb8fa8c44f3bd01831f7198d6d2fee635f9ca86de86608ea0f6d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to Shopify domains hosting PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely intended to lure the user into downloading further malicious content. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to educational exercises.

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.com/pify?keyword=exercices+complement+de+phrase+cm1
    • http://files.citylifeconstruction.com/uploads/1/3/1/8/131872178/4435579.pdf
    • https://cdn.shopify.com/s/files/1/0451/0544/7065/files/81231207252.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0095/files/95553681619.pdf
    • https://cdn.shopify.com/s/files/1/0436/2023/7475/files/11882390480.pdf
    • https://cdn.shopify.com/s/files/1/0434/6442/5622/files/fajajafopesi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8092/2789/files/bholanath_song_2019.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/91358280397.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/vifasiwosovajoxuvosep.pdf
    • https://cdn.shopify.com/s/files/1/0436/1378/2179/files/samupinufi.pdf
    • https://cdn.shopify.com/s/files/1/0457/3636/2140/files/easy_piano_sheet_music_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0434/7261/7637/files/pibagakizizudefawukogek.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_off00005bb2.bin
e87c6ee5844d69e666c1747de02cc399ce5ff81003501775c4f1c94387c36d4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB2 5388 bytes
font_01_sfnt_off00006ddb.bin
17fa15776cbeeaafc5cbf36a78834a03aad4c299b3a2c707ca6829cd664fbe59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDB 10364 bytes
font_02_sfnt_off00009146.bin
b63c29193854eaab96a893fde1fd6e8f220d84dc313f09445897379fa833073d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9146 16684 bytes

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