Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1bf15cabf42868…

MALICIOUS

PDF

58.9 KB Created: 2020-08-18 12:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d899a2cbca5e95e217057154261e3700 SHA-1: f291b7e1b8983ed8a9c4a91026651378632bd617 SHA-256: aa1bf15cabf4286892088b4a670a7e039886869c1d91354bc6f62b5949349618
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is `https://ttraff.cc/pify?keyword=vaastav+movie+song++sindoor+lal+chadhayo`. While many other links point to benign Shopify domains, the presence of the redirector suggests a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=vaastav+movie+song++sindoor+lal+chadhayo
    • http://pemoluded.thirdeyeelixir.com/uploads/1/3/0/7/130775734/6133421.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/form_3903_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/vipigefejiwebesudimifa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/all_you_zombies_heinlein.pdf
    • https://cdn.shopify.com/s/files/1/0436/8603/5621/files/weleselub.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/drakor_puberty_medley_sub_indo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/varicela_adultos_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/16842348750.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/pixalexejifokawofuritibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/jupuxozuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/2456650395.pdf
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/cuales_son_los_antibioticos_de_amplio_espectro.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f3c.bin
00b71bffed89c9429e79294a0d9c9c8cc9c0dd6badf6782a9c0cf98125f5df83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 5268 bytes
font_01_sfnt_off000080f8.bin
28b9f555ba6fafa3471c73f5ed33e956b9bcc9362bb25783a9e9b906a874d4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F8 14720 bytes
font_02_sfnt_off0000aea6.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA6 4324 bytes
font_03_sfnt_off0000bca8.bin
6928a901da52b3a2f028bef9b4fd46a60e86d3f679a1263f42a5b9a9b795e446		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA8 10324 bytes

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