Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a7834a5f34025b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 05:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33380011230f2d2c1376869c4953f821 SHA-1: 85f4150c9d4d50d40b0682f8dfeb6c5c460f2bb1 SHA-256: d5a7834a5f34025b85fcefdf17e1659e7a460294e692d8656f998538a132b8b7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.cc/pify?keyword=catalogo+de+bujias+ngk+2020+mexico+pdf', is identified as a malicious redirector. The document body text, though partially garbled, includes this URL, suggesting the document's purpose is to lure users into clicking malicious links under the guise of providing a catalog. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=catalogo+de+bujias+ngk+2020+mexico+pdf
    • http://sifugor.rosesandsatins.com/uploads/1/3/1/6/131606027/zuzigadojumedu_pemufewivoz_noruziruw.pdf
    • http://wupok.mmusiksmak.com/uploads/1/3/1/4/131482995/1074574.pdf
    • http://fabesixox.coldcomfortknits.com/uploads/1/3/1/3/131381428/eb5aebfa5b.pdf
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdf
    • http://files.fitrisslightstudios.com/uploads/1/3/2/8/132814166/6617307.pdf
    • https://cdn.shopify.com/s/files/1/0433/6209/1167/files/beer_lambert_law_in_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/27815545797.pdf
    • https://cdn.shopify.com/s/files/1/0431/8878/1219/files/75523840935.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3258/files/wafusumodinipipep.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/zuxafup.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/vedafixan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53151925343.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/snow_white_hi_ho.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/zajugalemafizofolewanine.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/gudimajipezivodomifekud.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/xiwanemefakusodebed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/72841201062.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/kaguvumoxetuvanabiwejisi.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_off000060b9.bin
91b0878d9a1cfee3525ce3a1f84974a719d4a8301a197399b44f618ad54ba508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 5908 bytes
font_01_sfnt_off000074cb.bin
c3ecbd96eb899b3b3e6d60d9c0bb8c65a7a838a9bc3a025bbab5f58d4e520812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 11148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.