Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a08b851fea2585…

MALICIOUS

PDF

42.4 KB Created: 2020-08-17 07:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8adbb9283eb282400b0fa54332113fb SHA-1: 355dd04fa0a8f8c612ffbd76dd0efff13d82332d SHA-256: a7a08b851fea258570d2b23528c8873b7f9bf5c5ee8206f9e57d8dbd0b02176c
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, many of which point to Shopify domains hosting other PDFs, suggesting a link farm. One prominent URL, https://ttraff.com/pify?keyword=aarariraro+full+video+song, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains the redirector URL and a reference to a video song, likely a lure.

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.com/pify?keyword=aarariraro+full+video+song
    • http://files.moanxiety.com/uploads/1/3/1/4/131453651/wulanobafi.pdf
    • http://files.eshipbestpracticessummit.com/uploads/1/3/0/8/130874125/niwenid.pdf
    • http://dadewus.womeninnaturenetwork.org/uploads/1/3/0/9/130969483/ba0d1eb.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/xidegowosaregumogaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/8325646922.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/galetudiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/mofonomagaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/cardiomegalia_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/504210007.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/vosixus.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/lijiziku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/banking_companies_act_1980.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7703/files/58290962055.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/mifixizimokubapol.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/using_statistical_methods_in_social_science_research.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_off0000481d.bin
6d926fbae358ff949800b8d455890ec93bfbf3b037abcd9fb59c8241234e5676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x481D 4928 bytes
font_01_sfnt_off000058e2.bin
ba709c76ded21acf8d92803b9f4827441472f369fe89ea3b050a176ca9ccd1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E2 5940 bytes
font_02_sfnt_off00006c87.bin
fde2b5b64de144cec1933fb6c7074b67f8f9e32b672cec94e11107c92e1a9b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 9896 bytes
font_03_sfnt_off00008e76.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E76 4324 bytes

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