Malicious PDF — malware analysis report

Static analysis result for SHA-256 0627ad20daf44d03…

MALICIOUS

PDF

42.3 KB Created: 2020-08-19 22:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e34397ab3e689cf00ad61b46f9836d39 SHA-1: 25dd0e52b23ebbb3519d40d7ce6d05fe3daf8eb5 SHA-256: 0627ad20daf44d03fe5b188a1ffe1213fb0d83589316fb2acc1411182f6800ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link directs to ttraff.com, identified as malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same lure text and URLs, suggesting an attempt to drive traffic to potentially malicious sites under the guise of providing useful information. The ML classifier also strongly flagged this PDF as malicious.

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=top+guitar+chords+android+app
    • http://files.jessicafeldheim.com/uploads/1/3/0/7/130739061/zunevofin.pdf
    • http://nugule.roguepugs.com/uploads/1/3/1/3/131380999/nidubaber_soremowusedoxu_wopimupilesutu_disexidokisaf.pdf
    • http://masogad.myvoiceback.com/uploads/1/3/1/6/131636725/semesidite_pabimiguduza_mipamelal_tamusorik.pdf
    • http://files.authoramyrichie.com/uploads/1/3/1/3/131383325/basupixebo-samaromove.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/green_book_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/excel_vba_sort_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/characteristics_of_bryophytes.pdf
    • https://cdn.shopify.com/s/files/1/0427/9071/5548/files/29079025936.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/71617534196.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/34101025039.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/88285442947.pdf
    • https://cdn.shopify.com/s/files/1/0434/3001/9229/files/34602041197.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/63250636843.pdf
    • https://cdn.shopify.com/s/files/1/0439/0119/0299/files/44568475279.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4658/files/rabakijuvujowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/30238572158.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_off0000675e.bin
d38eb7ecf9f4791a565a5b922ee9e4cda4f7851c744ddc38d6ef8c9d4853b2da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x675E 5252 bytes
font_01_sfnt_off00007930.bin
daf1882e0c79925bebcacbd63cd7cda87488147d481098f030192b6f9bf71279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 10288 bytes

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