Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e12ec25ad4fcd35…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 18:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 284485e148ecf0989556719c70a69401 SHA-1: b55e961af0c9920ceeb2fea8cb0c4ae394b0f8d4 SHA-256: 2e12ec25ad4fcd3564ee37d3cecb2f6f81f8fc91d61c1410f0768b052ff36a4c
154 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.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the string 'Cyanure de sodium formule' and the malicious URL, suggesting a lure related to chemical formulas. The presence of a PDF link farm heuristic indicates an attempt to distribute malicious links widely. The ML classifier strongly flagged this PDF as malicious.

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=cyanure+de+sodium+formule
    • http://gozewex.chinesemartialartsmd.com/uploads/1/3/1/4/131437246/gamidawifixarij-wovekiwodapula-gitatemita-xumogexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/budexojimomamuzarumedi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/wapatuwifebosetisevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/tuzifitulowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2010/7424/files/34889327045.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/vumulewebugijofodar.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7238/files/tagixozixelozodos.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/macmillan_english_worksheets_for_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/2247/4651/files/carpenters_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/exercises_to_practice_numbers_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/nebuzoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11067845032.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/pogujojatopogili.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/children_santrock.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_off00006444.bin
258c557e9a11ce41f175b22435c7babe8fc8cda81a3e066e351503df5839a990
pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 5060 bytes
font_01_sfnt_off00007563.bin
bd6512540d7e3d80df9b5c04e98df26adb2c10f051c5c805dc9c2b996f06086d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 10600 bytes