Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb4dc2b01a690f6…

MALICIOUS

PDF

50.9 KB Created: 2020-07-31 11:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b838235caa68f054965807a15f5def75 SHA-1: a30bd533a95ec7543134fe5a00c553e0bbe2b921 SHA-256: 0bb4dc2b01a690f68580e01b790e469287d173bc5a5f77da122253326416f8ae
162 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to generate traffic or distribute content. The presence of a download button lure further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bankers+adda+computer+capsule+pdf
    • http://files.roadiesrule.com/uploads/1/3/1/1/131164199/7b31fa1f3127cb.pdf
    • http://files.sonomadrivingtours.com/uploads/1/3/0/9/130969548/waburikojomofetu.pdf
    • http://files.christiestimber.com/uploads/1/3/2/3/132302815/a80bec9c772bc.pdf
    • http://files.jeremiahdbullfrog.com/uploads/1/3/0/8/130873830/8c35d759.pdf
    • http://files.crosspointkennel.com/uploads/1/3/2/8/132815785/9e175d0bdf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/gotobipaxoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1773/files/92106288073.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/47576231687.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/86429922369.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/14779754514.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/gazawirubave.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/73159671361.pdf
    • https://cdn.shopify.com/s/files/1/0436/0830/9923/files/mixusiluzufix.pdf
    • https://cdn.shopify.com/s/files/1/0432/2200/7969/files/mexidufizegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/gezofimebazojel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/wuzewawapux.pdf
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/73173522622.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/74741071304.pdf
    • https://cdn.shopify.com/s/files/1/0428/2987/3318/files/52088892673.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_off00007d8e.bin
8012cb2d997d875a16ba3a401dc41cff5b14f2cc9971856a4ba163ef75b2c898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8E 5248 bytes
font_01_sfnt_off00008f47.bin
bccb7e74487ca23de5749034337963febc0756eec3e099ae62e9065d34ea01cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F47 15372 bytes

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