Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b40ed54a67fe66…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 02:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db04010f3db7547856163cc520c79f55 SHA-1: cbaeee3d29b4ddebdab54176957fb89ef5710482 SHA-256: f5b40ed54a67fe66abcd1bb3114a6b02600de441ad3f787fb3e1bc2655b72848
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though partially corrupted, includes text related to 'Caring for your baby and young child 6th edition pdf', suggesting a lure to disguise the malicious intent. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of external links, typical of SEO poisoning or link farm abuse for traffic redirection.

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.cc/pify?keyword=caring+for+your+baby+and+young+child+6th+edition+pdf
    • http://files.apartment-serviced.net/uploads/1/3/1/3/131398475/9266602.pdf
    • http://xesukaj.fruiggie.com/uploads/1/3/0/7/130775403/razobetalu.pdf
    • http://files.gardenfestbakersfieldcollege.org/uploads/1/3/0/8/130814229/8116130.pdf
    • http://files.davisfamilyatdeanpark.com/uploads/1/3/2/8/132814518/wowuxesenanen.pdf
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/79790018618.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/77531684213.pdf
    • https://cdn.shopify.com/s/files/1/0437/3472/8853/files/www_craigslist_org_philadelphia.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/72543470843.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/puzzle_and_dragons_z_orb_code.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/tuloxuximamiwur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/82971954621.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/xejobudigapujusupudu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/bright_futures_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4250/files/leonflix_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/solikejokete.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/ferekugakujiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/21043308714.pdf
    • https://cdn.shopify.com/s/files/1/0435/5627/4339/files/hyundai_wiring_diagrams_free.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_off00007d69.bin
f50bfaaaf5c1dcf7c9e4f51e30f5d7d787bd3684ce5a6cd888b5988898517725		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 5540 bytes
font_01_sfnt_off00009041.bin
b08180d61f864c0c26d750003793a153d04e10bc7b46f572717222925130d758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9041 10588 bytes

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