Malicious PDF — malware analysis report

Static analysis result for SHA-256 89badde75f80bf53…

MALICIOUS

PDF

39.8 KB Created: 2020-09-04 05:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c53f2759903320536f0138dd870eed SHA-1: ec181d247caeaf6bb8e70dad6622f44d98169135 SHA-256: 89badde75f80bf537c00b087d56d86a037eeabb6198c87b23718cac723d35860
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, disguised as 'Data analysis excel 2003', leads to the ttraff.link domain, a known malicious redirector. The PDF also contains a link farm heuristic, pointing to multiple PDFs hosted on Shopify, one of which is identified as a potential initial payload or lure.

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.link/pify?keyword=data+analysis+excel+2003
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/dederologolizorudipi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/guided_by_voices_tour_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/50258539286.pdf
    • https://static.usrfiles.com/ugd/30ea26_3ab0892a1f944188998c32c8d7d8e585.pdf
    • https://cdn.shopify.com/s/files/1/0436/7309/2246/files/alimentos_antiinflamatrios_e_antioxidantes.pdf
    • https://cdn.shopify.com/s/files/1/0449/8941/5583/files/nctb_class_8_math_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3633/files/11223935861.pdf
    • https://cdn.shopify.com/s/files/1/0448/0519/3885/files/callan_method_stage_6.pdf
    • https://static.usrfiles.com/ugd/d9f7b5_6d942d691fc243cab0a6acb0bcef54f7.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_dcc17236edf54c318fe2d5beffae4605.pdf
    • https://static.usrfiles.com/ugd/ca300b_fcfbb6b65c394fae8f04bf63f8ac8511.pdf
    • https://static.usrfiles.com/ugd/afe78f_bd6f8901083d4d13b280fb737341cd18.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_off00005ed2.bin
6bc5f3362507719c30bb1ed8d94aab362cf09807d7a678e82e71dca9869c9eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 5304 bytes
font_01_sfnt_off00007105.bin
07f09c1081c8054596f64d035fe8530fcc63a83181123fb745ddea565cd91607
pdf-font-stream PDF embedded font (sfnt) at offset 0x7105 9884 bytes