Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5165685c956589…

MALICIOUS

PDF

49.2 KB Created: 2020-10-18 22:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4b7bc9dd520505125a69fe462db10e05 SHA-1: 29b0f3e3b2bd3dc662e44d8526c9f88798f96c0f SHA-256: da5165685c95658954598b0452a1cdb61bcc84281e289fbb966e52dbef0ec68c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. This suggests the primary purpose of the PDF is to redirect users to malicious content, likely for further exploitation or phishing.

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/123?keyword=descargar+app+facebook+gratis+para+android In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2231/7725/files/43627194404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3921/9099/files/nazopewukojomej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1525/4428/files/p90x_core_synergistics_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2170/5631/files/usf_morsani_college_of_medicine_acceptance_rate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7894/2360/files/931587963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7680/2967/files/33822021881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/1452/5596/files/96150232903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/35828852457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/how_to_beat_plantera_in_10_seconds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/hero_line_wars_starlight_build_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2645/9035/files/how_to_grow_arborvitae_from_seeds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6507/1520/files/22794009535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/82810795788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3169/0903/files/sizuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/7373/0213/files/british_record_label_nyt_crossword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b7d10f-6b02-478f-8fe9-20c624807e5e/vinokuxibomefizota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33459f0f-7745-4f79-86bb-ab711a7995e1/tunenipozutunas.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 5496 bytes
SHA-256: b8b92a6f6ace36bee347daf66932df65968f0c2e4e2cfcc2fcd10c94c5fc6506
font_01_sfnt_off00007f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10120 bytes
SHA-256: eb4686506bb368032dabacb9e5147119d53abc94dfb50f933cb5ee1547c14867
font_02_sfnt_off0000a176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA176 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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