Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b7efdfae48df5a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 06:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94015cec140a1504e4ebe255e2cbca6b SHA-1: 51fbe4b3eba24e82f1940c34c36de6f8886f6205 SHA-256: 03b7efdfae48df5a92f40304d11293fbab56decb1e87165d153d0a9abdfb9804
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, disguised with keywords like 'autocrat google form add on'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution lure.

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=autocrat+google+form+add+on
    • http://tixutazug.raisingthedeadband.com/uploads/1/3/0/7/130776687/8226301.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/nalejopedi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/topological_data_analysis_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/download_itunes_12._5_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/68941616536.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/2503930159.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/laporan_pendahuluan_asma_2017.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/axl_movie_dual_audio.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/75041954294.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/9345483227.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/kumasajunizuzusalu.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_off00006838.bin
26a926c202808ce5b22e8220aa2353fce99c15e2f3f353cfb81e6c2cd6591b99
pdf-font-stream PDF embedded font (sfnt) at offset 0x6838 5152 bytes
font_01_sfnt_off000079a7.bin
11a7353263166d00aabc4b7002dc819cf6186cc3982f9c381063df3b90fb1f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79A7 13592 bytes