Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f37f240e773cd5c…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 02:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a198281fab936d38daa9a7dc1ed30339 SHA-1: 3b6a7dc0d1b23aa17d430f0016ed566f5086d37c SHA-256: 3f37f240e773cd5c230438a19e07f570ee4d6a2868cf74d58570ae7c461574bf
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=instrumentos+bursatiles+pdf', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious infrastructure through a deceptive link farm.

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=instrumentos+bursatiles+pdf
    • http://files.rawlinsmusic.co.uk/uploads/1/3/1/6/131637325/nifoliwosoxo.pdf
    • http://files.grazingtheory.com/uploads/1/3/1/1/131164132/wiboferufugupi_zobaguso_zinexeraxuv_tifuviwefe.pdf
    • http://nijogid.107equipmentsales.com/uploads/1/3/0/7/130739564/katoxixofobot.pdf
    • http://files.u2nesco.com/uploads/1/3/1/3/131381078/mezola.pdf
    • http://files.somethingsoldsomethingsnew.com/uploads/1/3/2/6/132681026/9365149.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/limaborulesezunuveraruk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/54013055631.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/greek_math_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/adobe_reader_convert_to_word_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86562581376.pdf
    • https://cdn.shopify.com/s/files/1/0430/1353/7951/files/julena.pdf
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/52152246200.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/kukipigusazejeragugugiz.pdf
    • https://cdn.shopify.com/s/files/1/0449/2728/7451/files/syarah_barzanji.pdf
    • https://cdn.shopify.com/s/files/1/0433/8787/9587/files/wefolexibomolivusaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43127542751.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/senanipipabapamabup.pdf
    • https://cdn.shopify.com/s/files/1/0431/1800/2343/files/xogopiwesewirubazizidej.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_off000074ab.bin
50de9b4b97e273c134306f1f51f1df00eec98aa712273f8457b04d0c8ab0cf0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 5264 bytes
font_01_sfnt_off0000866e.bin
c09e6fd405092540765c902d28de879d690e4a3a7f5f3b5f4271e3f2dba9d0dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 12448 bytes