Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0748e5acc94c7a…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 12:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f325a434c4650d85a6996332f11cd35c SHA-1: c966b9f2cd8ca03d4a310297e1cf520f4355733d SHA-256: db0748e5acc94c7a388db394dace963bfdf01e87683ff288b7ca0d97db71e601
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The primary malicious link is https://ttraff.com/pify?keyword=no%25C3%25A7%25C3%25B5es+b%25C3%25A1sicas+de+administra%25C3%25A7%25C3%25A3o+p%25C3%25BAblica+para+concurso+pdf. This suggests the document is designed to lure users into clicking malicious links, potentially for SEO manipulation or to redirect to further malicious content.

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=no%25C3%25A7%25C3%25B5es+b%25C3%25A1sicas+de+administra%25C3%25A7%25C3%25A3o+p%25C3%25BAblica+para+concurso+pdf
    • http://files.jovaunholmes.com/uploads/1/3/1/4/131438150/66f4161.pdf
    • http://files.getlacedhair.net/uploads/1/3/1/3/131383998/162355.pdf
    • http://files.gethilineinsurance.com/uploads/1/3/1/6/131607269/8187401.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/after_the_love_has_gone_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/langstroth_beehive_plans_metric.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/nissan_forklift_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/operations_management_a_supply_chain_process_approach.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/69606869194.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/45762184960.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/36262465548.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/82983904644.pdf
    • https://cdn.shopify.com/s/files/1/0431/2868/4701/files/78285346061.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/silati.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/dazukisakaluv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/osrs_archery_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/2888/8227/files/kodukidulisexo.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_off00005fdb.bin
c41384f161dfa34d1e40262f7228386d08e4290a5435b3c6c7425ff1fee97681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDB 6476 bytes
font_01_sfnt_off0000739f.bin
9276aef20bdec3580cfcfd17c2424aa4af21461eed5dcad72e056b10d15cb86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x739F 12012 bytes

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