Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a23b9cbcd47fd4d…

MALICIOUS

PDF

233.4 KB Created: 2020-08-17 11:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1477e685269beea413533de5549e99ee SHA-1: da8d02a6215a389634497b262d4bddb4806c3b99 SHA-256: 2a23b9cbcd47fd4dcbac458a9c89e3d9550da7a547e8db8c151fd1939ed14e6e
92 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Autopsy the last hours of tv guide' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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=autopsy+the+last+hours+of+tv+guide
    • http://sazozi.steinbachcommunityoutreach.com/uploads/1/3/1/4/131482975/8c1d8f.pdf
    • http://wejud.justinecelebrant.co.uk/uploads/1/3/1/6/131607131/luwemu.pdf
    • http://kabuf.cosmicbabies.org/uploads/1/3/0/7/130738755/9588671.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://files.josiesjoys.com/uploads/1/3/1/1/131163867/jobonugelipub.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/96504012480.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/44564981909.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/38089105508.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/zafuzabesijonodu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/codex_adepta_sororitas_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/35621237135.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/bureaucracy_defined.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/99057274687.pdf
    • https://cdn.shopify.com/s/files/1/0431/6269/7894/files/jupizoduwefex.pdf
    • https://cdn.shopify.com/s/files/1/0449/6467/5752/files/78810803494.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/finance_commission_chairman_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00034f0f.bin
b4e393147db85c917e52452e8a6e6329f5967301db8482c7a6576c90cc384b27
pdf-font-stream PDF embedded font (sfnt) at offset 0x34F0F 5228 bytes
font_01_sfnt_off000360fd.bin
345b3a95ac6ca37582346b8523a001fd8122d5fc862fd5470c598ca419286f9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x360FD 11808 bytes
font_02_sfnt_off0003886e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x3886E 4324 bytes