Malicious PDF — malware analysis report

Static analysis result for SHA-256 448c0e8ad152759c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-12 02:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faa17b22818f27bde4fadf8bb2cce157 SHA-1: 58728db734f59719426a0c438733f0f9593efed6 SHA-256: 448c0e8ad152759cbd54e604b6bc0f5f1252787d128ba9ce541880896a8890bd
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, forming a link farm. One of these links, https://ttraff.com/pify?keyword=cees+nooteboom+rituelen+pdf, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious infrastructure through a deceptive link farm.

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=cees+nooteboom+rituelen+pdf
    • http://files.countrystylebbqcatering.com/uploads/1/3/1/0/131071114/bivowizojuzone-belidujep-dobarobizub-vadarafo.pdf
    • http://files.egy4dev.com/uploads/1/3/1/6/131637056/6941870.pdf
    • http://sukuda.monicarayscott.com/uploads/1/3/0/7/130776433/kokidipitaleto-duvevaku-tisovibavike.pdf
    • http://welud.faithbaptistsrb.org/uploads/1/3/1/4/131438392/7331461.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/62839586104.pdf
    • https://cdn.shopify.com/s/files/1/0428/5608/7708/files/9443910348.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15125842299.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/ethyl_acetoacetate_reactions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4858/2820/files/23952870542.pdf
    • https://cdn.shopify.com/s/files/1/0433/5301/4427/files/beviwosiwivore.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/solving_equations_8th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/14158758296.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7649/files/pemel.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/dekijefonubumad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/15930713880.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98572357872.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_off000063de.bin
386bf88368eee6883e90481b1aeac6e187b929a406816e2ba09183b73a397924
pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 5020 bytes
font_01_sfnt_off000074d0.bin
2cf28c6386aae29166492ca12905f63e0f6d2b783625d725f2024f221f55dbb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 10016 bytes