Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f58fe327896356…

MALICIOUS

PDF

41.1 KB Created: 2020-08-07 00:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0659aa726ff9e891b2114c3b462ab889 SHA-1: 5de48a999680268adb5395beedbf8134bfa8320f SHA-256: 70f58fe327896356451a8085e971d77b33e7b22e947fbd8ddb02f4c545aeb0d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a link farm designed to manipulate search engine results. One prominent link directs to a malicious redirector, ttraff.com, which is likely used to funnel victims to further malicious content. The document body itself contains text related to editing PDFs, serving as a lure to encourage clicks on the embedded malicious links.

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=how+to+edit+text+in+a+pdf+file+for+free
    • http://files.kinddesignsbyvalentine.com/uploads/1/3/2/6/132681647/7751407.pdf
    • http://files.lotusranch-homes.com/uploads/1/3/1/4/131407655/09ad03412.pdf
    • http://files.morningstar-arts.com/uploads/1/3/0/7/130739802/xoziz-sunowu-govanejusa.pdf
    • http://files.dancefuriously.com/uploads/1/3/0/7/130775032/nimojeru_modidoku_sujufukokaruj.pdf
    • http://files.nsksstaffers.com/uploads/1/3/1/3/131379700/1a4bfed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8992/8096/files/sarah_palins_iq.pdf
    • https://cdn.shopify.com/s/files/1/0433/7473/9607/files/global_business_today_8th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/wunarelanis.pdf
    • https://cdn.shopify.com/s/files/1/0429/8063/8879/files/cfa_level_1_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/83105977113.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/38818983258.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/xivujakanipavorit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40323832667.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/36223079298.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/venumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4900/0864/files/95745859454.pdf
    • https://cdn.shopify.com/s/files/1/0430/6056/0021/files/gakawogiredodavifad.pdf
    • https://www.sejda.com/pdf-editor
    • 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_off00006489.bin
eb1b32796ecb2f1828fd1f01d5551de0aa231587a67fe8b1afd6731f88ba0766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 4980 bytes
font_01_sfnt_off0000759e.bin
d9861fd4b364216131597ceb82ab472967441ea0afeab960f81739c9118cc971		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 9940 bytes

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