Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43de7a15c02215e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 06:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa1e4618116ede16c5d7ef8729963c65 SHA-1: 74ed51d4c95fc13c8911bf996b735de63c13a5d5 SHA-256: c43de7a15c02215e47125e857c57f11fe252bfd5a0ad8675f61ead286f6bb511
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at ttraff.ru. This suggests a link farm or SEO poisoning tactic to lure users to malicious content. The ML classifier strongly supports the malicious verdict.

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=planas+de+vocales+para+imprimir+pdf
    • http://files.owenyelland.com/uploads/1/3/1/8/131871730/3626150.pdf
    • http://files.elizabethcommunityconnections.com/uploads/1/3/1/3/131383665/zemadeda.pdf
    • http://files.kingstrengthperformance.com/uploads/1/3/0/7/130739519/joridal_duzagen.pdf
    • http://files.thekenbrooksshow.com/uploads/1/3/1/8/131856212/xizezaruridepe-vitizunopenafu-daxeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7760/files/dazomur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0512/files/dimowula.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/antioxidant_oxidative_stress.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/90179125845.pdf
    • https://cdn.shopify.com/s/files/1/0428/5336/7975/files/topoxikemezidaroso.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/34839272943.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/toxameradijajaguvemoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/63893893986.pdf
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/classroom_of_the_elite_light_novel_volume_7.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/55052107225.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/80325958210.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/91273972485.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005269.bin
77074cb068903728cf4841ce6493aed82ea1df9c086dafc07ca5db2ea8ba2764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5269 5068 bytes
font_01_sfnt_off00006386.bin
7861506fd94001e3d84f312e0330c70d265db02eb0ff9d18e90dbbe96944d421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6386 10856 bytes
font_02_sfnt_off000086be.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86BE 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.