Malicious PDF — malware analysis report

Static analysis result for SHA-256 8998b904e0be2d0b…

MALICIOUS

PDF

52.7 KB Created: 2020-08-05 02:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 062c4f7f82dec5455e57e8728399d700 SHA-1: 161ec515401c7d34af599fa5ccff07d7e7208045 SHA-256: 8998b904e0be2d0b88e828f9a077fff6da9e52b7d1c3a295a3b74402e8fc6a56
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though corrupted, contains the text 'Anencefalia fetal pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a known malicious redirector.

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=anencefalia+fetal+pdf
    • http://files.qixingtanglang.com/uploads/1/3/2/6/132681294/gijiminamile.pdf
    • http://files.ddrainbow.com/uploads/1/3/1/6/131637483/ludexekuka.pdf
    • http://files.stjohnlutheranchurch.com/uploads/1/3/1/4/131453060/wodum-xozofer.pdf
    • http://files.northlincsbeekeepers.org.uk/uploads/1/3/2/7/132710787/8653750.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/73497369779.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/phylum_chordata_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/9042253345.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0433/1811/6510/files/dorirasiwitewulogexixajip.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/25388756703.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/microeconomics_hubbard_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/32774957130.pdf
    • https://cdn.shopify.com/s/files/1/0431/0034/0381/files/dokevatusogetix.pdf
    • https://cdn.shopify.com/s/files/1/0429/6258/3711/files/71103689154.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/meiosis_worksheet_answers_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/jakozubizitoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/essentials_of_mis_11th_edition.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_off0000912d.bin
77729babe0e04ae83761f3384abfd50cd199ea28e993b148c6f89684276f795a
pdf-font-stream PDF embedded font (sfnt) at offset 0x912D 4864 bytes
font_01_sfnt_off0000a1d9.bin
31bb141ad6eb5040b4665661265786bbf346870fefe4a750b932131dc7e5d13a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D9 10676 bytes