Malicious PDF — malware analysis report

Static analysis result for SHA-256 80710a03461054b2…

MALICIOUS

PDF

46.6 KB Created: 2020-08-25 15:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e309562c822145f147b655a8d2452da7 SHA-1: 2ad82ab0103bd791aacdea643a98e5a7dac175a7 SHA-256: 80710a03461054b2208c6d2941e91bd3902a56d4cd6f47e3ee78c4b4fe1cd0d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one pointing to a known malicious redirector, ttraff.com. The document body, though partially corrupted, suggests a lure related to a 'leave application in school'. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the attack pattern of social engineering via a deceptive document.

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=format+for+leave+application+in+school
    • http://gunaduti.umcreationcaresummit.org/uploads/1/3/1/6/131606490/lokunigaxonade.pdf
    • http://files.blitzhomebuilders.com/uploads/1/3/1/0/131070497/68f7323b969.pdf
    • http://ritusigid.runninonfaithtc.org/uploads/1/3/0/7/130775358/7634734.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3797/files/whirlpool_refrigerator_manual_wrf555sdfz.pdf
    • https://cdn.shopify.com/s/files/1/0439/1777/0920/files/kivokabomefinokok.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/4591558071.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5118/files/jivajogubewudeposutegi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/xozitifi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6955/files/volkswagen_jetta_2017_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/9098474913.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/general_comments_for_report_cards.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/xilebozena.pdf
    • https://cdn.shopify.com/s/files/1/0429/2545/7575/files/bank_preparation_books.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/73656618149.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6538/files/lexus_sc300_manual_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0461/8233/4617/files/famozejujavexepujusu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/66411007371.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007937.bin
4a74afccf69dfe9361f9b9c51a55a3b6d253a67b0d1da74a4b9f0fbfba6bcdd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7937 5272 bytes
font_01_sfnt_off00008b01.bin
bd0e599da051707beca6ee698833beae7320b9751a15edb267e093e02dd56584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B01 10120 bytes

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