Malicious PDF — malware analysis report

Static analysis result for SHA-256 097cb2c4d540d6ef…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 02:31:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd3f5de389e0e9cdae19803519a63966 SHA-1: 9c6daa6265f14d60da202aa909022359378c0045 SHA-256: 097cb2c4d540d6efbbffb679e438ab1a083f8bf4259ebb056fdadfb432502467
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a 'datasheet catalog diode', a common lure for phishing or malware delivery. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious redirector.

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=datasheet+catalog+diode
    • http://files.oharts.net/uploads/1/3/0/7/130740118/kumewinudep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0461/9275/4839/files/99263096801.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/vagolovalofe.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/half_centimeter_graph_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/5407/9910/files/lovipatigegufunerit.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/xadevimusunopakivew.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/vojiruposidigima.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/41018940810.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2423/files/99828023497.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/fibixema.pdf
    • https://cdn.shopify.com/s/files/1/0430/1524/1891/files/business_model_analysis_example.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_off0000583a.bin
1619990cb9d42ef68d2b13763c5fa766536322f0f18a94ecd9059cbd07390835
pdf-font-stream PDF embedded font (sfnt) at offset 0x583A 4788 bytes
font_01_sfnt_off0000688b.bin
63eb9f1ce02604c0929abaad571e82d4501fedf8fdd728a00df9a69bcc10c43a
pdf-font-stream PDF embedded font (sfnt) at offset 0x688B 14320 bytes
font_02_sfnt_off000094c6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 4324 bytes