Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5b4aa35756a3c3…

MALICIOUS

PDF

42.4 KB Created: 2020-08-13 23:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b90598fbed90c3e495dbbe74e43efa7c SHA-1: bc125093e9015b603ef9d36095288134e359df31 SHA-256: 7a5b4aa35756a3c3ddd733d554ec79bae2dc6463953f684234c3ba914053067f
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=deformation+of+the+crust+continental+drift
    • http://files.catandcrow.net/uploads/1/3/0/7/130775045/tivekup.pdf
    • http://files.thepearloutletonbranchview.com/uploads/1/3/2/6/132683289/wesepakivoruwixajuto.pdf
    • http://files.mvhsmajorslibrary.com/uploads/1/3/1/3/131380480/a716d247b6b8.pdf
    • http://files.hugsplus.com/uploads/1/3/0/7/130776180/muxumudugal.pdf
    • http://movozu.faithbaptistalturas.org/uploads/1/3/1/3/131380600/xukela.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/putoxopivovoxewawamofajuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/vowels_and_consonants_sounds_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/mitsubishi_eclipse_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/determination_of_carbohydrate_by_anthrone_method.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/kurixajomokidutegamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/wazemunev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/abellio_greater_anglia_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/naleduzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/bafixuvamemopabomixupesek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/gopamake.pdf
    • https://cdn.shopify.com/s/files/1/0436/6155/7913/files/2809643349.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/zekuwefipagidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9807/files/12858108442.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/gonaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4573/2007/files/sibamunedabizotujipok.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_off000068a6.bin
a3d3b0175a33e280e5bd95b29419d64f0f1918673b388398640bd5656378acd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A6 5260 bytes
font_01_sfnt_off00007a56.bin
532de578a8c660076fa82ed22f6a72d1748085fda626dae33fa24367a2c00168
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A56 10100 bytes