Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26db45ae731ec21…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 02:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab95b097617f6cc00d39987d667449f7 SHA-1: 9d4bfeaae644db29a1d23f829f61c1f5322551f7 SHA-256: d26db45ae731ec2196dc20d63fe4d3c47a56841c7912b389f9bd6da5812d3dd8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=chromium+browser+for+windows'. This indicates a social engineering lure, likely attempting to trick the user into downloading malware or visiting a malicious site. The presence of a large number of embedded links, many hosted on Shopify, suggests a link farm for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=chromium+browser+for+windows
    • http://mojigogu.buddiesbooksandbrunch.org/uploads/1/3/0/8/130874329/sokakovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/minagusapikudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/balance_sheet_template_under_ifrs.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/98798980203.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/breville_coffee_maker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/motorcycle_flat_rate_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/nipinofuvibodik.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/gorugega.pdf
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/sensors_actuators_and_their_interfaces.pdf
    • https://cdn.shopify.com/s/files/1/0429/4233/3087/files/22762997343.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/call_of_cthulhu_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/29395070412.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/magisterium_the_golden_tower_free.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_off00005f5d.bin
b45cde00dc7f50c65e554d0fc2ce919636e14205aec6477a27171d861b64f284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 5988 bytes
font_01_sfnt_off000073f6.bin
50d209ab838de1fc0077025885df29a0cdaf3a73fe905e287c4e2d8cefd08d84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5040 bytes
font_02_sfnt_off00008508.bin
db9f58b23e39b4f2a41bb7899d29b096cc3ec7062766c4d6dd5ba1a5fc52c4d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8508 13708 bytes

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