Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb7f616ab53c59d6…

MALICIOUS

PDF

112.2 KB Created: 2020-08-07 19:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ce4e466c2911f85ab0d453c0d8c5495 SHA-1: f3c234876dae0ebee5fac1abc21cd9542e6e62e0 SHA-256: fb7f616ab53c59d6eab84ffec867be47ab6c819e3ef0553de720b018679a5a38
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the URL and text that likely serves as a lure. The presence of numerous external PDF links also suggests a link farm or SEO poisoning attempt to increase visibility.

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=cerebellum+functions+pdf
    • http://files.simplyyogacenter.org/uploads/1/3/0/7/130739376/kidegojesovux.pdf
    • http://files.normasbooks.com/uploads/1/3/0/7/130738993/nikor_koxavik.pdf
    • http://files.mcloughlansupplies.com/uploads/1/3/0/9/130969085/934055.pdf
    • http://files.beapaige.co.uk/uploads/1/3/0/9/130969430/732713.pdf
    • http://lotizoku.tylerbiology.com/uploads/1/3/2/3/132302780/sesotalusixekutudit.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/maxobataratewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/napitiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9562/9725/files/92183283568.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/futari_no_hero.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/rededalojenudigi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/50344490259.pdf
    • https://cdn.shopify.com/s/files/1/0439/1718/1083/files/aasm_scoring_manual_2014.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/convertir_de_a_word_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7520/6294/files/juriz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/62653107388.pdf
    • https://cdn.shopify.com/s/files/1/0435/3831/7471/files/mavifitoxujunelowenipebu.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_off00016ae6.bin
7fec3c72213f5a968bf09d398998d5755839c4ed8e93902de876c2e719ca325c
pdf-font-stream PDF embedded font (sfnt) at offset 0x16AE6 5136 bytes
font_01_sfnt_off00017c3c.bin
6da019fe390ed6e13f9b9cc94fab23b92d9a5b8596b4a759a3db6f092dbf3110
pdf-font-stream PDF embedded font (sfnt) at offset 0x17C3C 12200 bytes
font_02_sfnt_off0001a4cc.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4CC 4324 bytes