Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b758b548e2cb05…

MALICIOUS

PDF

42.8 KB Created: 2020-08-21 05:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6824db31a2fc988f937d8ed4f1d5f89 SHA-1: 1a6bd6725189ccf226e1e12e48347c18ae4e27e7 SHA-256: 57b758b548e2cb0503153cfc2b8b0ce5cf11bab5cd215e0dc095a4ec19dec94b
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly 'https://ttraff.cc/pify?keyword=powerpoint+templates+business+free', suggest a lure to download potentially malicious content disguised as business templates. The presence of numerous links points towards a broad distribution or redirection strategy.

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=powerpoint+templates+business+free
    • http://files.ciaowireless.com/uploads/1/3/1/8/131871390/pogasegega-xobewolewoz-werosigamana.pdf
    • http://files.hearwellcandles.net/uploads/1/3/1/6/131606111/270712.pdf
    • http://files.eventfinishers.co.uk/uploads/1/3/1/4/131453194/zulekaxujepoza-savudugo-bepak.pdf
    • http://guzofezo.carpetcleaningsummerland.com/uploads/1/3/0/7/130739591/103f12.pdf
    • http://files.alisaherriman.com/uploads/1/3/1/4/131406036/lefemolugefobu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/15271726913.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/zoposoguximikigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/81157461134.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0431/4211/9592/files/environmental_economics_kolstad_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/piboxapilozobedit.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/rimukuzadiki.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/90678893116.pdf
    • https://cdn.shopify.com/s/files/1/0429/5278/6074/files/zetikodisavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/12646521616.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1700/files/50069145294.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_off00005e1b.bin
446834dbd119aed74066ef81638eb2734c9f8e864c84241fdcff152c6908c5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1B 5164 bytes
font_01_sfnt_off00006f8b.bin
94c2fb3a0a6fa9a8af7fddf5a5bda4d911f10ac6ba9d28e817488e719c56d206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8B 9640 bytes
font_02_sfnt_off0000905f.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x905F 4324 bytes

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