Malicious PDF — malware analysis report

Static analysis result for SHA-256 89effd8ad24801ae…

MALICIOUS

PDF

44.5 KB Created: 2020-08-02 01:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb966b077c3bfa9a4c69e88da9647ea4 SHA-1: 56be45eef3348dd33455b6fd3208d145fc4dc57e SHA-256: 89effd8ad24801ae39cee38d083e18668a509a77fd8482870fb283c8dd9b8018
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=metroid+nes+manual', is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or malware distribution.

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=metroid+nes+manual
    • http://files.14thstreetartistcommunity.com/uploads/1/3/1/4/131452800/xukajarufumopin.pdf
    • http://files.nutritionistforhealth.com/uploads/1/3/2/6/132682882/d8c4e54d1351e23.pdf
    • http://files.alexklein.net/uploads/1/3/0/9/130969845/rixikul-jaduzitufubuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/madivefebaledazasitiviz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3056/9382/files/59493065292.pdf
    • https://cdn.shopify.com/s/files/1/0438/2438/2114/files/subaretutide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/zemirib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5682/files/star_wars_galaxies_trainers.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/28031201432.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/vasawapajavoreta.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/44914955104.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/71679144811.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/ximuzeperilogowale.pdf
    • https://cdn.shopify.com/s/files/1/0428/2541/6860/files/giweta.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/40715560882.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_off000070c0.bin
e057fafbe756c75909197aa8f3e3dcf049e79e5a8337b7f7c1e38a76c5a02a7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C0 4976 bytes
font_01_sfnt_off00008195.bin
e720637827bc4e438095dd892ada34474901c06d6122252b1a31f7eb5dd26ddd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8195 10552 bytes