Malicious PDF — malware analysis report

Static analysis result for SHA-256 6055b7c182784c84…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 11:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 708e61b625a468987078affde2646c43 SHA-1: 4fe04779bdbed227ee90ca0552ed2ec3df243cb6 SHA-256: 6055b7c182784c84b20445f8b6d05439972c7d3dcc3407f634760fb09cf8caed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful destination. The document also features a large number of external PDF links, suggesting it is part of a link farm designed to manipulate search engine results or distribute content. 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.cc/wix?keyword=compuesto+quimico+de+la+leche
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a91264_0504e27fe58b48f6bd1c506a2a23b829.pdf
    • https://static.usrfiles.com/ugd/26938b_64e34dc967324ad0b2d52073c9049764.pdf
    • https://static.usrfiles.com/ugd/1cc7e8_adef5ded34d7448ebfa2e780827b9d91.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_853612a68fb34abab005d17a493ec518.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/sujixowasapale.pdf
    • https://cdn.shopify.com/s/files/1/0429/4528/2214/files/49493871261.pdf
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/genetically_modified_food_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2359/7725/files/56667755637.pdf
    • https://static.usrfiles.com/ugd/9ea91e_e46c575ee5db49789754287c9f96aa5b.pdf
    • https://static.usrfiles.com/ugd/1decf9_aebd84e662c04c779732696f5f77ebbb.pdf
    • https://static.usrfiles.com/ugd/0cd019_cf1df23581124bebba400231469927a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_62c0611ca66d4988bbad41c61cec1fd7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0570/5374/files/93319794.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/from_dusk_till_dawn_netflix_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/81596005910.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/70688539012.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/24215178277.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_off00006bdf.bin
e20047f4fbd18f5d866f125a870a80c648f4ee853b6f5a533c815e85d0ebf1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 5248 bytes
font_01_sfnt_off00007d8c.bin
7b8482eca570402972f4ac7160c4f87bf83f6240ffcbe84199e2906de06df1f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 11588 bytes

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