Malicious PDF — malware analysis report

Static analysis result for SHA-256 793603dcba449a32…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 21:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a668432393df331a400f2c193444157 SHA-1: 1c9b5da90cc0cef851ebb4de0d7180f739c6c2a8 SHA-256: 793603dcba449a3214b85a48dd8c6451d9bb14a663bb034069d07c1641a2cd4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a mass of external links, including a critical redirector link to 'ttraff.com'. The document body, though partially corrupted, contains text that appears to be a lure for 'bestiario pdf espa ol', suggesting a phishing or scam attempt. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content or traffic.

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.com/pify?keyword=bestiario+pdf+espa%25C3%25B1ol
    • http://files.benhamu.com/uploads/1/3/2/6/132681647/suwefugex.pdf
    • http://gizus.cadenceequestrian.com/uploads/1/3/1/4/131407552/jalof_nelajuviful_fogumenujimifog.pdf
    • http://webam.elliottkronenfeld.com/uploads/1/3/1/4/131482995/diwegugaburol_pilakeb_gutovebija_vofazumu.pdf
    • http://files.rameyphotoco.com/uploads/1/3/0/7/130739483/mikabetuna.pdf
    • http://files.laraodwyerbrown.com/uploads/1/3/1/6/131608037/dojufonapuvewamux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/zimijixududulef.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/44546363637.pdf
    • https://cdn.shopify.com/s/files/1/0450/5174/0310/files/fisiopatologia_da_hernia_de_disco.pdf
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/fajefetukozoxezofan.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/tekafuwinijovera.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9115/files/11504116200.pdf
    • https://cdn.shopify.com/s/files/1/0438/9502/9915/files/benafapimegosex.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/vodafone_job_offer_letter.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/18237813985.pdf
    • https://cdn.shopify.com/s/files/1/0431/0355/1645/files/gixokixusuduvuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1942/6197/files/unity_2d_collision.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/wugit.pdf
    • https://cdn.shopify.com/s/files/1/0428/1666/7815/files/55330043821.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d3.bin
055cda26b87f7f2c0dc4303df422574b1f62fbc039ca7772bcf653a0d8c18534		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D3 5296 bytes
font_01_sfnt_off00007aa6.bin
283a909368b3e4da11c70d5d98e756fc6510efb80b64a3d441854f30dee45835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 11000 bytes

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