Malicious PDF — malware analysis report

Static analysis result for SHA-256 628e4dce8893d950…

MALICIOUS

PDF

44.0 KB Created: 2020-08-08 02:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e738b89a5089c8912d811479f6566d SHA-1: 570de58ee8950541fe53d1a621e16e2a36aea123 SHA-256: 628e4dce8893d9502c86b206605335471c3385bd33abefca11c70d9969b9b76e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution.

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=fungsi+budaya+organisasi+pdf
    • http://files.celebrationsbyphillip.com/uploads/1/3/1/3/131384605/dd72153b.pdf
    • http://files.textilesfsg.com/uploads/1/3/1/4/131437711/ce992d5.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.qecareereducation.ca/uploads/1/3/0/8/130874608/9719411.pdf
    • http://files.caralehmann.com/uploads/1/3/0/7/130739621/laxovinotu-vavotudenu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/44432962456.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/92225724773.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/28656780791.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/affixes_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/95570698178.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/suzalibuxojarotilajew.pdf
    • https://cdn.shopify.com/s/files/1/0435/6535/1071/files/anemia_classification.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/38999012576.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokisesuzarutaxiwiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/60225401652.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/33075598695.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/9322294146.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/71186005860.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/anchoring_script_for_republic_day_in_english.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_off00006bef.bin
b126db9c633002c372759748ca2fc7b504552c52bbeb02f993075578a9a120c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 5372 bytes
font_01_sfnt_off00007e4a.bin
1f966ffd8e1e2ae8b3eeece5524b8ff7d4702b1d1503e92b2dbb4198ac994e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4A 11588 bytes

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