Malicious PDF — malware analysis report

Static analysis result for SHA-256 994439b094a43ff1…

MALICIOUS

PDF

43.1 KB Created: 2020-08-10 07:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d43a4669afb73370943adc3c4f1fb124 SHA-1: 749e201fec07e2fe77b1a4f0242d60375ef3bbbc SHA-256: 994439b094a43ff19586daf3a0fa981591a942f5b2236fcbfcc1bf5dcbcb051a
152 Risk Score

Malware Insights

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

This PDF document contains numerous links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain a lure related to a 'cb insights global fintech report q1 2020 pdf'. The presence of a link farm and a critical heuristic firing for a malicious redirector strongly suggests a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.ru/pify?keyword=cb+insights+global+fintech+report+q1+2020+pdf
    • http://files.groundedlearning.com/uploads/1/3/0/7/130738806/fuwusimop-pedojoza.pdf
    • http://tevadefov.nysekwang.org/uploads/1/3/1/6/131607062/8992149.pdf
    • http://files.wonderfulpowerfulme.com/uploads/1/3/2/6/132695457/4722105.pdf
    • http://files.thefrontpaige.co/uploads/1/3/1/3/131384468/xabuzojukok_bimorirafogulip_pabinizakubex_zomofezugomev.pdf
    • http://files.cameratakilkenny.com/uploads/1/3/0/7/130775539/d0bce7173d.pdf
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/xarepekesodivazaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1028/5990/files/14271445005.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/2998/files/cours_d_anglais_avec_traduction_en_franais.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/67931654254.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/38773097107.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/wenar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5276/files/wewiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/40806960132.pdf
    • https://cdn.shopify.com/s/files/1/0433/5540/6494/files/71439253098.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7575/files/jegufuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7011/2423/files/distribucion_binomial_negativa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/xatajufipariru.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/33694922231.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_off00006756.bin
3fd8bdb85fcba359bf718f52b16dbe3043392848cc584a0c274f75abf9c6105b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6756 5916 bytes
font_01_sfnt_off00007b68.bin
5d90c7e63a5b6ec72c76cbfdc50d74572efafb16175b50bf2e36691b436b49b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B68 10608 bytes

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