Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecf7b2c08a986db…

MALICIOUS

PDF

55.0 KB Created: 2020-08-19 10:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99477bc1bb59b640eab0643168c78352 SHA-1: d2257a07396fbb4e71fe4ebe02b112caf8a34875 SHA-256: 2ecf7b2c08a986dbdbd521fe6cf3abe382bb4f31be0c0fe1e2384383a215899b
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=adnan+sami+all+song++mr+jatt', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL, suggesting it is the primary lure. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=adnan+sami+all+song++mr+jatt
    • http://zaritisug.ingerlene.net/uploads/1/3/0/7/130776031/kovazexate-rivif-pudapuveriki-rawujiraguxel.pdf
    • http://demupikan.magicaladventurestravelwithjennifer.com/uploads/1/3/1/6/131637218/vufapepiruxite_kiseme.pdf
    • http://muxos.monteservicingandrepair.com/uploads/1/3/1/4/131438356/2317821.pdf
    • http://fodoki.peculiaritypress.com/uploads/1/3/2/3/132303382/1961698.pdf
    • http://pijebur.partnersinsustainablelearning.org/uploads/1/3/1/4/131437626/4892158.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/rozeviwanaviret.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/57218061464.pdf
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/agrarian_reform_law_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8589/files/bhu_bsc_nursing_entrance_exam_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/dikiwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/zibebozuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/1667/4713/files/hambriento_nach_libro_completo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/autocad_learn.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/baranasasefavupufejiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/bright_futures_2_year.pdf
    • https://cdn.shopify.com/s/files/1/0432/5844/5979/files/vegodituxezasanas.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2471/files/wozeruwer.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/kegagupuvofazulokinufav.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/60607499401.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_off00008b5e.bin
9d1b8b9569c65e675f2c2424f8e47c214d825b1e09c97125a5619d44febd8659
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 5212 bytes
font_01_sfnt_off00009cfb.bin
943991ee5321d9df92894bd8a019cb1b85d8f58eaedaf067d5a980897e2285ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFB 15340 bytes