Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7427fde4da9f8ac…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 14:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d78fe5a96080d1532fc0d2198fa4f34 SHA-1: d024cfc3d46f9abb89879b7f289f4b0baba00ebc SHA-256: a7427fde4da9f8ac42d11a1aa3971de1c882b0b52be704d5feba9610fd5f7215
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=ikea+guide+d%2527+installation+cuisine'. The document body, though partially corrupted, suggests a lure related to IKEA kitchen installation guides. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to manipulate search engine results and distribute 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.ru/pify?keyword=ikea+guide+d%2527+installation+cuisine
    • http://vaxex.robertlpepper.net/uploads/1/3/2/3/132302780/gajuxufa-domavabidixa-jakoxekimifo.pdf
    • http://files.reading2reading.com/uploads/1/3/0/9/130969555/49253ecafb.pdf
    • http://files.pilatesandyogawithsharon.com/uploads/1/3/1/8/131872048/nigez.pdf
    • http://kubiwomid.partnersinprayerforourprodigals.com/uploads/1/3/2/8/132814930/715471.pdf
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/88266130834.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6429/files/hcg_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/mivabosoponu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/resmed_cpap_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/26656255167.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/pepapavikozupi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/44422207807.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/88124326865.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/66230801376.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/27635501807.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006458.bin
7946cbbc2c88132c86543194bcbc85335cdd6875584717269eddd7adea79af93
pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 5048 bytes
font_01_sfnt_off0000759a.bin
5da0657c99fd579e36f5083ad50637144c23b8c9fb41348452a227e0f4ce70f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x759A 9876 bytes