Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c30d0c7bdf7641…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 18:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7331d97a1a4801c1a6e4db8a44e30aa SHA-1: f6fc12d29cf1298117de0fa17e4a1571f1d555cf SHA-256: 09c30d0c7bdf7641f22a0a672e09e47bb4023f0c1964e3f49ca1d59d46d2fa13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file 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 known malicious redirector infrastructure at `ttraff.com`. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to lure users into clicking it. The ML classifier also strongly indicated maliciousness.

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=list+of+countries+in+the+world+by+continent+pdf
    • http://files.craftdrones.com/uploads/1/3/0/9/130969313/c3c6b0a7.pdf
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.pdf
    • http://files.jlsnsales.com/uploads/1/3/1/3/131380052/xomutuviko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/9502664876.pdf
    • https://cdn.shopify.com/s/files/1/0428/3292/0739/files/angelsim_osu_skin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/velokiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/44202094937.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10699911966.pdf
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/achilles_tendonitis_exercises_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/61502134437.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/51262621061.pdf
    • https://cdn.shopify.com/s/files/1/0430/5630/0186/files/john_bon_jovi_blaze_of_glory.pdf
    • https://cdn.shopify.com/s/files/1/0436/9612/8153/files/jurnal_anemia_terbaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/12585880185.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/anticancer_a_new_way_of_life_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1996/files/paniwirexemugukotis.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_off0000799d.bin
4dd8eccf73e1d16f6433b3bcb6f2572608b736530c5d8be6e5841e713ce9feb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 5308 bytes
font_01_sfnt_off00008bbf.bin
105ca452c249886a7f67f9d2223b7af9bc76726b643aff19eaa21217dcfaeae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBF 9972 bytes

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