Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6e6e5672627919…

MALICIOUS

PDF

59.1 KB Created: 2020-08-19 13:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 232869634fa02269b0a9adde28124e0b SHA-1: c29219ecd82ab9b9fa77f6c8a5951dbd67d066ae SHA-256: bb6e6e5672627919d259d21c83a6d818d350bf2e01da549bde99177bfb6d91dd
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a significant number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=balak+natha+song', points to a known malicious redirector. The presence of a link farm suggests a broad distribution attempt, likely for phishing or a scam.

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=balak+natha+song
    • http://refuru.mytailoredbeauty.com/uploads/1/3/1/1/131163864/vujitumagijevur.pdf
    • https://cdn.shopify.com/s/files/1/0434/7589/4422/files/47871025057.pdf
    • https://cdn.shopify.com/s/files/1/0437/2388/2664/files/40885020063.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/tifebutifevisejow.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/chhichhore_movie_imdb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/90336742445.pdf
    • https://cdn.shopify.com/s/files/1/0432/1427/4720/files/vapuwimasuwizogonulix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovegutug.pdf
    • https://cdn.shopify.com/s/files/1/0439/0957/8904/files/ghatna_chakra_gs_book_for_ssc_in_english_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/39819699874.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6501/files/faximep.pdf
    • https://cdn.shopify.com/s/files/1/0431/5136/0164/files/89119220993.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4220/files/95201751229.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_off000091d2.bin
d4e495d5708e3391b13c4976a504d7f1b4f0597a89ef2fa7a5876cb34da7d064
pdf-font-stream PDF embedded font (sfnt) at offset 0x91D2 4964 bytes
font_01_sfnt_off0000a2b5.bin
dc9a6195a63e27079fcfa0d6c7ddbd0731920e5337e29dfcda820d6b08c191da
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B5 3180 bytes
font_02_sfnt_off0000afbd.bin
2ce58277149cd5be3562567209aba924bd4495eb5929560561faedd5a51f4687
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBD 15528 bytes