Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31f81cba66ed261…

MALICIOUS

PDF

43.4 KB Created: 2020-08-28 09:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd55b04be69db7273539aa2d0b29ae07 SHA-1: a9f51ea02368eff46950d40a092a14de9ccffd9a SHA-256: d31f81cba66ed261d6c8f723d61766ea8f521d7c3fe18db1b05aeacc449e0bb8
150 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Shopify domains, but one critical link redirects through ttraff.com, a known malicious redirector. This suggests the document's primary purpose is to trick users into visiting malicious sites by presenting them as PDF downloads. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=robotica+control+de+robots+manipuladores+pdf
    • http://jevifop.cwmfindingaids.com/uploads/1/3/0/8/130814328/rolanakizip.pdf
    • http://maxigoxa.healingthroughtheendoflife.com/uploads/1/3/1/4/131437423/6018453.pdf
    • http://todudixe.hilliardbradleyfootball.com/uploads/1/3/2/6/132695569/foxukaxuwa.pdf
    • http://kaneseped.brackloonns.com/uploads/1/3/1/4/131482975/1842320.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/80849103399.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/vapalavabel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5239/9777/files/zotowogim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdf
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/78090895147.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/one_step_equations_with_fractions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/99983730869.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/70798770.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/45394558773.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/dazorogudubuzuke.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_off00005c97.bin
a962f8625b477d9328d9c794472db92ced0e0548533d2df61ded5210803054af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C97 5328 bytes
font_01_sfnt_off00006e90.bin
6650a5c40680bf7b20cc1a6d285ad27279faabf11a7110564f9b507db864946b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 10112 bytes
font_02_sfnt_off000090d8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90D8 4324 bytes

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