Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0910b63c43f0c16…

MALICIOUS

PDF

33.9 KB Created: 2020-08-19 15:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eba455a7795a1be59e70f8ab504396ba SHA-1: 268d320a53f7ee600d96f5e09627a01e81f26815 SHA-256: d0910b63c43f0c1626af6aaa627b92db4b8d2c8317391b90e0db7392133b7b73
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though partially corrupted, suggests a lure related to 'Microsoft access tutorial 2010 pdf'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a strong intent to direct users to potentially harmful content. The ML classifier also 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=microsoft+access+tutorial+2010+pdf
    • http://pepaxu.mortoncc.org/uploads/1/3/1/1/131163635/pofodolab_girenakipuwiv_bododoxofo.pdf
    • http://witewem.anjool.org/uploads/1/3/1/4/131407241/bujemis.pdf
    • http://files.tylerdesroches.com/uploads/1/3/0/7/130775219/9c76f.pdf
    • http://xozuv.reachingforgreatnessguide.com/uploads/1/3/0/7/130776445/vonekudo-tofokadag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5684/0354/files/20589101562.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/79128697809.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8376/files/zojetibozipikorokuwozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6167/3126/files/zepujowuwabodesobupir.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/84834252324.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/pavekuwojobulat.pdf
    • https://cdn.shopify.com/s/files/1/0433/7182/3262/files/missouri_attorney_general_racial_profiling_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/88266163094.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/brazilian_jiu_jitsu_beginners_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/92691833960.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_off000047a4.bin
ceb109ea7b817401410b3236f4cd00c72ecae9c8b61d91d500b8fb1aeb0d50d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A4 5480 bytes
font_01_sfnt_off00005a56.bin
636916cc5abe38b9730ac160977717732b4dc5c73000e1a17569b413db66486a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A56 9552 bytes