Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fac386e92722d82…

MALICIOUS

PDF

52.9 KB Created: 2020-07-31 21:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb6beae275de77badba97b9a804a3d46 SHA-1: ae1c7092965ee60d5c111e6ab06b51f420e4d033 SHA-256: 1fac386e92722d82d6640ebfc8dbc7faa6ed527291c286b72c36ceba696f18e7
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to deliver a secondary payload. The document body, though obfuscated, contains the text 'Popular pizza toppings' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on cdn.shopify.com, indicates a link farm designed to improve search engine ranking for 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.cc/pify?keyword=popular+pizza+toppings
    • http://files.real-dominion.com/uploads/1/3/1/0/131070294/3531608.pdf
    • http://files.english.shenfieldlearning.com/uploads/1/3/1/4/131408364/gebujape_mototon_legomija_lalorinepe.pdf
    • http://files.eleganthealing.com/uploads/1/3/0/8/130874539/ditile-falowifu-vonodifa-magige.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/bijizop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4270/0455/files/sijirabenedunasak.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/bebusorelapenuvom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/tefezeruwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/34564446030.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/32498115589.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/gemolovukaxide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/4720486365.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/wuzoxeferujekupagijosupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/16509939643.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/46438451957.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/76768247736.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/zenidokutovobisefosasiro.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/fexosinojijoxojav.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_off00007a19.bin
d839566cdd8637a8d884f92950db38cab64b695a47b015fedff8d9f07f29dbd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 5036 bytes
font_01_sfnt_off00008b51.bin
ac8d10a3437ba49bdacb952fb0c019ac0203f18af553fc13c4782b2fa9c755de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B51 10604 bytes
font_02_sfnt_off0000af91.bin
529ec628cca77db3653daca828dae1b5a463cb63475da782a8d5067b933e7c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF91 16828 bytes

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