Malicious PDF — malware analysis report

Static analysis result for SHA-256 122ca51842cc634e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 13:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7b8d8c89d7f61842e9286802881f7e SHA-1: fd2754ea4db7b662d0dc5afc9d898e8aff3d96cb SHA-256: 122ca51842cc634eceee9ebbbc1ddce3d58a5403fc5b2246f6602747cf600218
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, including a critical redirector link to 'https://ttraff.cc/pify?keyword=aerobic+endurance+training+improves+soccer+performance+pdf', suggesting a phishing or malware distribution attempt. The document body also contains embedded URLs pointing to external PDF files, some of which are generated in a link farm pattern. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.cc/pify?keyword=aerobic+endurance+training+improves+soccer+performance+pdf
    • http://files.bahaisofdallas.org/uploads/1/3/1/3/131384173/c36330a.pdf
    • http://mewat.christinelanphotography.com/uploads/1/3/0/7/130738993/8346147.pdf
    • http://files.missionmobilizationjonasmuyima.org/uploads/1/3/0/7/130775102/b66ff47acfb3521.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/dobowesutudexesuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/71966791077.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/kagidalako.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/effective_advertising_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/does_mipmapping_improve_performance_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/1976169517.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/gotuxizubumonejinan.pdf
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/sister_location_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/89658059038.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/guzitipisemagilapizib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc7.bin
76039032b86242e6e5c686a4949d7d8d94d2c672f61f79a568b7fa2d17e1ca73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC7 5632 bytes
font_01_sfnt_off000072d9.bin
60e03bf205cd1da0cf0ef27487d03df679ea6e54933cd56ab326dd3f5e30efc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 10376 bytes

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