Malicious PDF — malware analysis report

Static analysis result for SHA-256 184ad24dad97511c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 05:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986ed0ad740006191c36f1e9fb550f3c SHA-1: 1968078b495e6d6d1bd1efa7e5f1e091683a3f24 SHA-256: 184ad24dad97511c06c125e8621e7399e651b6623ab12c76fc439a09c6fdfe6c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.ru/pify?keyword=contemporary+approaches+to+artificial+general+intelligence+pdf, which is flagged as malicious. The document's structure suggests an attempt to create a link farm or SEO spam, ultimately directing users to potentially harmful 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=contemporary+approaches+to+artificial+general+intelligence+pdf
    • http://files.happyvalleycalisthenicsclub.com/uploads/1/3/1/6/131636956/f6558.pdf
    • http://files.sweetcheeksbyjulie.com/uploads/1/3/1/4/131453146/7270457.pdf
    • http://files.gruslindgrenartgallery.com/uploads/1/3/0/7/130775952/mijavukagejegav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/tuvaxijuzaxazasikiwuzimi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/59078551434.pdf
    • https://cdn.shopify.com/s/files/1/0438/4358/4162/files/catapult_physics.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/date_format_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/kirepuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/45907990648.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8872/files/92298247288.pdf
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/werawijosikepigulib.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/57908804890.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/small_merges.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007109.bin
05029e254c512ca73eda00aa33f12f77dd269c5efd4a718fd80e2a6fa25333a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 5576 bytes
font_01_sfnt_off000083d1.bin
0ae48edfa564fe70568016768f3955241ef690595e54e92c1b31459d2efe32fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D1 10072 bytes