Malicious PDF — malware analysis report

Static analysis result for SHA-256 0997554c33694744…

MALICIOUS

PDF

40.2 KB Created: 2020-08-22 10:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94f69145364edeacc265bfc2a4ddf417 SHA-1: 27724bc60713bf0bf9d7b222e6437888c182fa37 SHA-256: 0997554c33694744d7f9e0db8775093f1dc5afbb6be556f66c03cd0459427713
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a 'Bosch router 1617 manual' and a URL pointing to a redirector, suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing malicious content.

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.com/pify?keyword=bosch+router+1617+manual
    • http://files.catholicnewmancenterlssu.org/uploads/1/3/0/8/130874458/miwipujowuw.pdf
    • http://pixeju.yourvapesupply.com/uploads/1/3/2/6/132682090/nulenowaba.pdf
    • http://files.mycbdstoreroom.com/uploads/1/3/2/6/132681910/josukufarofi.pdf
    • http://pawulol.boshuster.com/uploads/1/3/1/3/131383791/vifexami-darozavapupajup-nuvowot-domutu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/risoxijeges.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/863445684.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/60197754080.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/diwuwenakaxise.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/vopamedixuxejexexovexi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9690/6659/files/sad_cartoon_images_hd.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/fivopilifedulex.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/97485308766.pdf
    • https://cdn.shopify.com/s/files/1/0438/4797/5062/files/fumegasozarebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/11044136737.pdf
    • https://cdn.shopify.com/s/files/1/0437/6353/1933/files/xaneputato.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/city_of_toronto_complete_streets_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/47588499781.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/zorakedu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048a7.bin
49aed1ef8d6b479572b4d343dfa3f47ea3696a7b7cee590f832908f17546ddae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48A7 5208 bytes
font_01_sfnt_off00005a3a.bin
8f58d508ff846631e76ef6973183ee83cf694a5b3a3e3d2c661f51d792c13329		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3A 13196 bytes
font_02_sfnt_off000083c9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 4324 bytes

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