Malicious PDF — malware analysis report

Static analysis result for SHA-256 9becb592b7d8686c…

MALICIOUS

PDF

34.5 KB Created: 2020-08-22 04:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55c61c335ebad961f84148aa6ce5a11 SHA-1: e076e3b11ec1702de8b30aef5352faf716d5af8b SHA-256: 9becb592b7d8686c72fc5638b19915fec098e800baecbd2630d41b7ff2e4ef9a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits malicious behavior by hosting a large number of external links, constituting a link farm. One of the embedded URLs, https://ttraff.ru/pify?keyword=botw+interactive+map, is identified as a known malicious redirector. The ML classifier strongly supports the malicious verdict.

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/pify?keyword=botw+interactive+map
    • http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdf
    • http://files.womenslifechangecoach.com/uploads/1/3/1/3/131383544/c8661e.pdf
    • http://files.artslcc.com/uploads/1/3/0/7/130776142/32ae9a02.pdf
    • http://remoxo.totallylogicalfear.com/uploads/1/3/1/1/131164250/296b46032340.pdf
    • http://gubadip.systematicbiologysa.org/uploads/1/3/1/3/131380600/7648205.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/74067305518.pdf
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/bizuxufozixedupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2767/7852/files/10436689941.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/bbc_english_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0463/0354/3458/files/diffusion_and_osmosis_problems_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/0177/3212/files/smithing_guide_rs_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/norolisotikevunego.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/39450669313.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/wovejuzonimabutesowu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/pabepozopevoraguzetunoku.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/xaxome.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_off00004b0d.bin
5e7515be29c0ffd616331dd4b7d74f48b22a0fab97b60e5a6c5cdae76d0f0964
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0D 5068 bytes
font_01_sfnt_off00005c44.bin
d606fd966e2d325833a09e00b071c1c550d2dd448feb08afc7327323a95d4166
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C44 9656 bytes