Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1b250a3c943a93…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 05:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8f149f9f8ebed6bc06d94a6a2ac7cd7 SHA-1: 24bbf1aa5cdb368374536a00c41ccfd674c4a608 SHA-256: ec1b250a3c943a93ed1ce44d0b4ae9144acc7a8f58ab921eb7ac5232759751ae
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the text 'Boulevard of broken dreams bass tab pdf' and the malicious URL, suggesting the lure is to trick users into believing they are downloading a song tab. The primary malicious URL is https://ttraff.cc/pify?keyword=boulevard+of+broken+dreams+bass+tab+pdf, which redirects to further infrastructure.

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.cc/pify?keyword=boulevard+of+broken+dreams+bass+tab+pdf
    • http://lidixoxum.vyacheslavstoyanov.com/uploads/1/3/0/7/130776795/pisegataxomal-kamajosuxise-tutowopulewa-xalakigate.pdf
    • http://files.trainedbyinsulin.com/uploads/1/3/2/3/132303315/b325f7049.pdf
    • http://files.slowlywakingreason.com/uploads/1/3/2/8/132815003/zakolugoviwonot-kubovelalubemet-mufewina.pdf
    • http://gapul.felipevis.com/uploads/1/3/0/7/130738524/a5c3ef74f80dfc.pdf
    • http://xorunepir.tyingtheknotonyourbestdayever.com/uploads/1/3/1/4/131453323/038a2ff852434.pdf
    • https://cdn.shopify.com/s/files/1/0438/5836/2528/files/lego_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazutorigixasozesilax.pdf
    • https://cdn.shopify.com/s/files/1/0429/4616/6943/files/sargodha_university_bsc_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/nukagurizi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/56048227368.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/dizad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4130/0380/files/stalk_rot_of_maize.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/lemon_yonezu_kenshi_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61259485886.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/67049758278.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/rirozubun.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_off0000545d.bin
2765afac6affccfbd71dd2d095cd1e2e736aedddcaedf454e5ab8cef0dd4a132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545D 5500 bytes
font_01_sfnt_off00006706.bin
f4c4e834fef9bda08b86f4d51a28f005900145134a7ccf21fc81b18ab23bb8fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 13392 bytes

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