Malicious PDF — malware analysis report

Static analysis result for SHA-256 17231323d5995322…

MALICIOUS

PDF

54.1 KB Created: 2020-08-09 13:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68f38d410046938a10dd3800029fa233 SHA-1: 3461c63f10c0f8e85e869b549a294704ed119707 SHA-256: 17231323d599532225cd2afbe97054139be6ea2d30addc3b2e2db8ca5f573ca6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO spam operation. The presence of the malicious redirector URL points to a high likelihood of malicious intent, possibly for phishing or malware distribution.

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.ru/pify?keyword=secuelas+de+asfixia+perinatal+pdf
    • http://files.norwaygenealogybyjeanmarthaler.com/uploads/1/3/0/8/130814492/popixidadusi_fufeboxizinur.pdf
    • http://wudapajuz.berthaleal.com/uploads/1/3/0/8/130873995/8722560.pdf
    • http://files.freedomvalleyfarm.com/uploads/1/3/0/7/130775629/5c2f88.pdf
    • http://files.teamgodent.com/uploads/1/3/2/7/132740606/wisez.pdf
    • http://files.funkymonkeystore.co.uk/uploads/1/3/1/1/131164350/badepemefi_sotezinujuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/hello_my_baby_hello_my_honey_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/toefl_sentence_structure_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/great_god_of_wonders_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/4666/5382/files/witonuze.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/pafamesatimafuwefuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/fajoduwajegalugesuji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/gigutegurotomuwenoviz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/26553496088.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/craftsman_snowblower_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/lukozogodalusemez.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/3_2020.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_off0000932c.bin
8794d300be52641a4b3b10b37e9d667f187e6ea89b3ffd7f167bad45f6f8f9bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932C 5320 bytes
font_01_sfnt_off0000a55d.bin
567a20e1e26cd9e62aa1bc31947b1c069dfc72580707579e8e930238968ff8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA55D 11180 bytes

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