Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62614a0b4781139…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 15:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e31fdee2f0a355680cef490ad8cc5faa SHA-1: 6f4fab17fee378a31e88eb9f1a015f100f131ce6 SHA-256: b62614a0b478113930bda78b3317c23cc9fd95babbfedc67ef8ff8a7a8bebe88
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.ru, which is disguised as a search result for 'pie chart powerpoint template'. This suggests a social engineering lure to drive traffic to malicious infrastructure. The PDF also contains a large number of links to static.usrfiles.com, likely part of an SEO link farm to improve search engine ranking for the malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the delivery mechanism.

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/wix?keyword=pie+chart+powerpoint+template
    • https://static.usrfiles.com/ugd/b8c837_5499244c1e324821b1d722226c25bdcf.pdf
    • https://static.usrfiles.com/ugd/a4d998_22aaf8387fd84e2c9ba383ac51da96a9.pdf
    • https://static.usrfiles.com/ugd/51c472_c2161810e6284850900980dd17acf71f.pdf
    • https://static.usrfiles.com/ugd/ab0441_419ac40a9b8d4be89bded722ce748ba6.pdf
    • https://static.usrfiles.com/ugd/3e5d97_e649a014780c4cb6bbac07efcb1822d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f875d4407444259a3dbeb4d55c5e712.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd0b3a0287df4e118ca475ca41038545.pdf
    • https://static.usrfiles.com/ugd/b8c837_810fe72510334c9dab066ae399dc5e42.pdf
    • https://static.usrfiles.com/ugd/b8c837_cab7553f7f8c4a008b4a5201ebc96a32.pdf
    • https://static.usrfiles.com/ugd/b8c837_054f7823701d4e72b3a7a00e0b0ad30f.pdf
    • https://static.usrfiles.com/ugd/b8c837_160e3d8482a844458b9323f604b162d4.pdf
    • https://static.usrfiles.com/ugd/7041e4_3fdadd392bd640519dc0cb5cd461434a.pdf
    • https://static.usrfiles.com/ugd/097bd5_a56d084d45ac4f898539e62da554d66a.pdf
    • https://cdn.shopify.com/s/files/1/0429/9866/1279/files/paganini_cantabile_violin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/vedopejufemibuzovajufido.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/zofawufakosilobaxemafog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3970/files/cambridge_english_fce_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/81563726205.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_off00006594.bin
2b0c29c0480d5b55531af8fb7fc934c340c94eb48816f5bce46f3595f8268a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 5088 bytes
font_01_sfnt_off000076c8.bin
76e91ab6b6586b3053485642d98f1c5aaabb6ebea44b6e96de4fcd355e4b7599		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C8 9940 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.